Our Providers
Dr. Philip J. Cheng
Dr. Philip J. Cheng is a board-certified urologist that provides a full spectrum of care to his men's health and LGBTQ+ patients.
Dr. Cheng grew up in New Jersey and went to Rice University to study psychology. He received his medical degree from Baylor College of Medicine in Houston, graduating with honors. He completed his general surgery internship and urology residency at Harvard Medical School/Brigham & Women’s Hospital. After residency, he went to the University of Utah, where he completed his Genitourinary Reconstruction and Men’s Health fellowship under the direction of Dr. James Hotaling.
Dr. Cheng is also an accomplished violinist, athlete, and traveler.
College: Rice University, Bachelor of Arts, Magna Cum Laude
Medical School: Baylor College of Medicine, Doctor of Medicine with Honor
General Surgery Internship: Harvard Medical School, Brigham and Women’s Hospital
Urology Residency: Harvard Medical School, Brigham and Women’s Hospital
Fellowship in Genitourinary Reconstruction, Male Infertility, Sexual Medicine: University of Utah
Morristown Medical Center
University of Utah, Department of Surgery, Division of Urology
Rutgers Robert Wood Johnson Medical School, Department of Obstetrics and Gynecology
Rice University/Baylor College of Medicine Medical Scholars Program
Phi Beta Kappa
Fulbright Scholar
Baylor College of Medicine Basic Science Honor
Society of Genitourinary Reconstructive Surgeons and IVUmed Scholarship
North American Taiwanese Medical Association Foundation Scholarship
Below are a few recent publications from Dr. Philip J. Cheng. To view his full publication library, please visit here.
Sexual Dysfunction in Men Who Have Sex With Men
Conclusion: MSM have been neglected from sexual medicine research, which translates to disparities in health care. Further research that focuses on the MSM population is necessary to better educate healthcare practitioners so that MSM patients can receive adequate care that is tailored to their specific needs. Read the full abstract.
Pathways to Fatherhood: Evaluating the Priorities of Self-Identified Gay and Bisexual Men Pursuing Family Building Options
Conclusion: Understanding the circumstances of gay and bisexual men pursuing fatherhood allows for individualized care. Since several respondents desired twin pregnancies, it is important to counsel patients regarding the risks of multiple gestation and determine the motivations for this preference. Read the full abstract.
“The Back-Up Vasectomy Reversal.” Simultaneous Sperm Retrieval and Vasectomy Reversal in the Couple With Advanced Maternal Age: A Cost-Effectiveness Analysis.”
Conclusion: In couples with a history of vasectomy and female of advanced maternal age, it is most cost-effective to undergo a vasectomy reversal. If the couple opts for sperm retrieval for IVF, it is more cost-effective to undergo a concomitant vasectomy reversal than sperm retrieval alone. Read the full abstract.
Contemporary multicenter outcomes of continent cutaneous ileocecocystoplasty in the adult population over a 10-year period: A Neurogenic Bladder Research Group study
Conclusions: In this contemporary multicenter series evaluating CCIC, we found that the short-term major complication rate was low, but many patients require follow-up surgeries, mostly related to the catheterizable channel. Read the full abstract.
The Role of the Urologist in a Reproductive Endocrinology and Infertility Practice
Abstract: With male factor infertility accounting for up to 50% of infertility cases, demand for male fertility services has increased. Integrating a reproductive urologist within a fertility center allows for treatment of both partners simultaneously with easier, more convenient access to a comprehensive male evaluation and any indicated interventions. Read the full abstract.
Baseline Gonadotropin Levels and Testosterone Response in Hypogonadal Men Treated With Clomiphene Citrate
Conclusions: CC treatment results in significant increases in testosterone levels in most men. Baseline gonadotropins are not strong predictors for treatment response to CC. Adequate biochemical response with CC trial can be expected in most patients with normal or slightly elevated baseline gonadotropin levels. Read the full abstract.
Obesity and Baseline Estradiol Levels Are Independent Predictors for Initiation of Anastrozole in Hypogonadal Men on Clomiphene Citrate
Conclusions: In our practice, following CC monotherapy, 30% of men were initiated on CC+AZ. Obesity (BMI≥30 kg/m²) and baseline estradiol ≥18.5 pg/mL can predict the conversion to combination therapy with addition of AZ. This information can be used to counsel patients and also help to identify patients who can be started on combination therapy upfront. Read the full abstract.
Augmentation cystoplasty in the patient with neurogenic bladder
Conclusions: Enterocystoplasty remains the gold standard for AC, though more research is needed to better evaluate the morbidity of different surgical techniques and the indications for concomitant surgeries. Experimental methods of AC with tissue engineering are a promising area for further investigation. Read the full abstract.
Fertility concerns of the transgender patient
Abstract: Transgender individuals who undergo gender-affirming medical or surgical therapies are at risk for infertility. Suppression of puberty with gonadotropin-releasing hormone agonist analogs (GnRHa) in the pediatric transgender patient can pause the maturation of germ cells, and thus, affect fertility potential. Read the full abstract.
Outcomes of right colon continent urinary pouch using standardized reporting methods
Conclusions: Overall the rate of postoperative complications, readmissions, and reoperation was high, but in agreement with other contemporary series. This study helps to further characterize surgical outcomes after right colon pouch urinary diversion, however, similar to other studies in the literature, the rarity of the procedure limits the power to establish a link between preoperative patient factors and outcomes. Read the full abstract.
Is it time to start folate supplementation in men? The effect of paternal folate status on embryonic growth.
Preview: Maternal folate status is essential in normal embryonic growth, with deficits in folate resulting in neural tube and other developmental defects. The importance of maternal folate supplementation in preventing congenital malformations is evidenced in part by dietary folate fortification in countries like the United States. Although the relationship between a mother's diet and the long-term health of her offspring has been well studied, our understanding of how the paternal diet may affect fetal health remains limited. Read the full article.
Implementation of a Perioperative Venous Thromboembolism Prophylaxis Program for Patients Undergoing Radical Cystectomy on an Enhanced Recovery After Surgery Protocol
Conclusions: Implementation of a perioperative VTE prophylaxis program as part of an ERAS protocol that includes extended postdischarge pharmacologic prophylaxis was associated with decreased rate of VTE events after RC. Perioperative bleeding and readmissions related to bleeding did not increase with this intervention. Read the full abstract.
Dr. Masaya Jimbo
Dr. Masaya Jimbo is a urologist specializing in men’s health, male infertility, and microsurgery. He completed his medical and doctoral degrees at Thomas Jefferson University after studying biochemistry and chemistry at the University of Pennsylvania, followed by a urology residency at the Mayo Clinic and fellowship training at the University of Utah.
Dr. Jimbo is passionate about helping men overcome infertility, which is a factor in nearly half of all couples’ struggles to conceive. He provides compassionate, personalized care that addresses both medical and emotional needs.
In addition to his clinical work, he has published extensively, received multiple awards, and holds a patent. Outside of medicine, he enjoys spending time with his daughters, supporting their many activities, and reading science fiction and fantasy.
College: University of Pennsylvania with a BA in Biochemistry and an MS in Chemistry
Medical School: Thomas Jefferson University/Sidney Kimmel Medical College, and graduated with an MD and Ph.D. in Cell and Developmental Biology.
Urology Residency: Mayo Clinic
Fellowship in Men's Health, Male Infertility, and Microsurgery: University of Utah
2023 Awardee, NIH/NHGRI Ruth L. Kirschstein National Research Service Award – T32 Training Program in Genomic Medicine
2023 Awardee, Sexual Medicine Society of North America (SMSNA) Pfizer Research Fellowship in Men's Health
Professional Memberships:
Sexual Medicine Society of North America (SMSNA), member
American Society for Reproductive Medicine, member
American Urological Association (AUA), member
Dr. Puneet Masson
Dr. Puneet Masson is a fellowship-trained urologist specializing in male infertility and microsurgery. After earning his medical degree from Columbia University and completing training at NewYork-Presbyterian/Weill Cornell and Northwestern University, he went on to lead male reproductive programs at the University of Pennsylvania and the University of Miami. He has also expanded access to male fertility care nationally through leadership roles in academic medicine and Posterity Health.
At Peak Men's Health, Dr. Masson provides comprehensive, patient-centered care by collaborating with reproductive endocrinologists and offering advanced surgical treatments such as vasectomy reversal, varicocelectomy, and testicular sperm extraction. He also performs “no-scalpel” vasectomies and specializes in testosterone replacement therapy.
Outside of medicine, he enjoys traveling, fitness, reading, and cheering for Philadelphia sports teams.
College: Brown University with a BA in Anthropology and Biology
Medical School: Columbia University College of Physicians and Surgeons
Urology Residency: New York Presbyterian Hospital/Weill Cornell Medical Center
Fellowship in Men's Health, Male Infertility, and Andrology: Northwestern University’s Feinberg School of Medicine
Founded and directed the Male Reproductive Medicine and Surgery program at the University of Pennsylvania, building one of the largest practices in the region.
Promoted to Associate Professor of Clinical Urology at the University of Pennsylvania
Served as Associate Professor and Director of Reproductive Urology at the University of Miami
Served as Western Regional Medical Director and VP of Clinical Engagement at Posterity Health, expanding male fertility care across the West Coast
Built and expanded the male fertility preservation program at the University of Pennsylvania
Dr. James M. Hotaling
Dr. James M. Hotaling is a board-certified urologist specializing in men's health and male infertility. Dr. Hotaling is a physician at Peak Men's Health, RMA New Jersey’s first in-house urologist, and has an academic practice and fellowship at the University of Utah in Salt Lake City.
Having graduated from Dartmouth College with high honors in Biophysical Chemistry and History, he decided to pursue medicine, earning his medical degree at Duke University School of Medicine. He completed his internship and residency in Surgery and Urology at the University of Washington School of Medicine, while also earning his M.S. in Epidemiology at the University Of Washington School Of Public Health. He then completed a fellowship in Urology/Andrology at the University.
Dr. Hotaling is deeply invested in research and advancing the field of urology. He has been published in over 100 peer-reviewed journals, abstracts, and books and is a recognized speaker both nationally and internationally.
College: Dartmouth College
Medical School: Duke University School of Medicine
General Surgery Internship: University of Washington School of Medicine
Urology Residency: University of Washington School of Medicine
Fellowship in Andrology: University of Illinois at Chicago School of Medicine
Morristown Medical Center
University of Utah, Department of Surgery, Division of Urology
University of Utah, Department of Obstetrics and Gynecology
American Board of Urology, Certified
European Society for Sexual Medicine, Certified Specialist
Drug Enforcement Administration (DEA), Certification
Assistant Professor, University of Utah, Salt Lake City, UT
Holds several patents related to the field of reproductive medicine
ASRM technology/research committee
ASA board/industry relations chair
AUA incoming 2022 SSMR president
SMSNA education committee
WSAUA program chair 2019-2021
Editor JARG
Editor FNS
Editor IJIR
Editor Urology Times
Fellowship director
NIH NIAID study section grant reviewer
Below are a few recent publications from Dr. James M. Hotaling. To view his full publication library, please visit here.
Infertility/Epidemiology Publications
Effect of Folic Acid and Zinc Supplementation in Men on Semen Quality and Live Birth Among Couples Undergoing Infertility Treatment: A Randomized Clinical Trial
Conclusions: Among a general population of couples seeking infertility treatment, the use of folic acid and zinc supplementation by male partners, compared with placebo, did not significantly improve semen quality or couples' live birth rates. These findings do not support the use of folic acid and zinc supplementation by male partners in the treatment of infertility. Read the full abstract.
Baseline Gonadotropin Levels and Testosterone Response in Hypogonadal Men Treated With Clomiphene Citrate
Conclusions: CC treatment results in significant increases in testosterone levels in most men. Baseline gonadotropins are not strong predictors for treatment response to CC. Adequate biochemical response with CC trial can be expected in most patients with normal or slightly elevated baseline gonadotropin levels. Read the full abstract.
Somatic Health/Male Infertility Publications
Male factor infertility: an opportunity to investigate individual and family health
Abstract: Male infertility affects at least half of infertile couples, either as the sole factor or a contributing element. Despite its common nature, men seek infertility care at a lower rate than women. About 50% of men experiencing infertility do not seek professional help and up to a quarter of couples seeking infertility treatment do not complete a male factor evaluation. Read the full publication.
Male infertility: a biomarker of individual and familial cancer risk
Abstract: Associations between male infertility and cancer are gaining clinical attention. Relationships between infertility and cancer have traditionally been studied in women, but recent work has focused on the male component of reproduction. Infertile men are at an elevated risk to develop various malignancies later in life, primarily genitourinary malignancies such as testicular and prostate cancer. Read the full publication.
Basic Science/Translational Science Infertility Publications
Microfluidic System for Rapid Isolation of Sperm From Microdissection TESE Specimens
Conclusions: The presented microfluidic system can facilitate rapid and efficient isolation of sperm from microdissection testicular sperm extraction samples. A prospective clinical trial to verify these results is needed to confirm this preliminary data. Read the full publication.
Harnessing the full potential of reproductive genetics and epigenetics for male infertility in the era of "big data"
Abstract: The complexity of male reproductive impairment has hampered characterization of the underlying genetic causes of male infertility. However, in the last 20 years, more powerful and affordable tools to interrogate the genetic and epigenetic determinants of male infertility have accelerated the number of new discoveries in the characterization of male infertility. Read the full publication.
Erectile Dysfunction Publications
Erectile dysfunction management after failed phosphodiesterase-5-inhibitor trial: a cost-effectiveness analysis
Conclusions: Using expert opinion and published utility, cost, and complication data in a decision analysis, we demonstrated that IPP placement is the most cost-effective ED intervention following failed initial PDE5-I over a 10-year period as compared to alternate treatment options. Such cost-effectiveness outcomes may be used in ED management counseling. Read the full publication.
An Analysis of Popular Online Erectile Dysfunction Supplements
Conclusions: Our investigation revealed that human studies evaluating the efficacy of ED-S ingredients are limited and have yielded no definitive findings of the effects on ED. Patients considering ED-S use should receive appropriate counseling, given the prevalence of disingenuous reviews and the ready availability of Food and Drug Administration-approved drug therapies. Read the full publication.
Mackenzie Haggerty, DNP, FNP-C
Mackenzie Haggerty, DNP, FNP-C, is a Peak Men's Health nurse practitioner specializing in male infertility and reproductive health. She completed her bachelor’s degree and Doctor of Nursing Practice at Rutgers University. She began her career as a registered nurse in clinical and surgical urology before advancing her training as a nurse practitioner.
She provides fertility assessments, hormone evaluations, and individualized treatment planning, always in a supportive, compassionate environment. Mackenzie is licensed and board-certified, with prior experience at Garden State Urology and Total Urology Care, and is dedicated to helping individuals and couples navigate infertility with trust and care.
Outside work, she enjoys reading, cooking, time with family and friends, and caring for her dog, Potato.
Doctor of Nursing Practice (DNP), Rutgers University (2025)
Certified Family Nurse Practitioner (FNP-C), AANP (2025–Present)
Advanced Practice Nurse License, New Jersey Board of Nursing (2025–Present)
Registered Nurse License, New Jersey Board of Nursing (2018–Present)
Clinical and surgical urology experience at Garden State Urology and Total Urology Care
Advanced Practice Nurse at Reproductive Medicine Associates, specializing in male infertility
American Heart Association BLS Certification (2014–Present)