NPI registry status
Active
2026 NPPES data Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician NPI 1821388034
Verify on CMS → Marcella Willis-Gray
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician in Chapel Hill, North Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 121 in Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
497
Medicare Part D claims · 147 beneficiaries · Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician avg: 1K
Generic prescribing
62%
generic claims · 38% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Marcella Willis-Gray filed 497 Medicare Part D claims in 2024 as a Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician in Chapel Hill, North Carolina, prescribing 62% generic.
- 497
- Part D claims, 2024
- 62%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥61st
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Marcella Willis-Gray
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1821388034), first enumerated 04/10/2011.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 497 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Willis-Gray with other Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in North Carolina
- Dr. Catherine Harris, M.D. Morehead City, NC
- Dr. Arman Kahokehr, MD, PHD Durham, NC
- Dr. John Kaspar, M.D. Raleigh, NC
- Dr. Michael Kennelly, MD Charlotte, NC
- Dr. Vance Merhoff, MD Salisbury, NC
Other specialties in Chapel Hill: Student in an Organized Health Care Education/Training Program (1,523) · Clinical Social Worker (392) · Physical Therapist (267) · Internal Medicine Physician (258)
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician state by state →
CMS NPPES provider registry desk
NPI 1821388034 · Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician
NPI-10 · ENUM-MID · TAX-TRACE · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1821388034
- ENUM-MID 2011
- TAX-TRACE 121
- RX-LIGHT 497
- BOOK-THIN 6 in North Carolina
- PHOTO-ENUM Dana Kivlin, D.O. · 2011
Marcella Willis-Gray's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
497 ≥ 61st percentile 61% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Marcella Willis-Gray practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Marcella Willis-Gray?
Quality data not reportedPrimary specialty
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician
Medicare Part D claims
497 58% vs specialty avg
Specialty distribution in North Carolina
How Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician compares to other specialties among North Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1821388034 |
|---|---|
| Specialty | Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician |
| Gender | Female |
| NPI Issued | 04/10/2011 |
Hospital and facility affiliations
Facilities where Marcella Willis-Gray bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
University OF North Carolina AT Chapel Hill
Chapel Hill, NC
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Marcella Willis-Gray - brand share 38.0%
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician average
38% brand-name claims vs 62% generic, on 497 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
497
Total Claims
$119K
Total Drug Cost
147
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 766.333
- Total Day Supply
- 21,830
- Brand vs Generic
- 38% brand / 62% generic
- Brand Drug Cost
- $106K
- Generic Drug Cost
- $13K
- Antibiotic Claims
- 85
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 100% female / 0% male
- Age Distribution
- <65: 17, 65-74: N/A, 75-84: 62, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Marcella Willis-Gray prescribes most
Top Medicare Part D drugs by claim count, 2024
- Myrbetriq
Myrbetriq
106 claims
- Estradiol
Estradiol
89 claims
- Gemtesa
Gemtesa
62 claims
- Trospium Chloride 36
Trospium Chloride
36 claims
- Nitrofurantoin 27
Nitrofurantoin
27 claims
- Solifenacin Succin… 23
Solifenacin Succinate
23 claims
- Methenamine Hippur… 21
Methenamine Hippurate
21 claims
- Nitrofurantoin Mon… 21
Nitrofurantoin Mono-Macro
21 claims
| Drug | Claims |
|---|---|
| Myrbetriq Mirabegron | 106 |
| Estradiol | 89 |
| Gemtesa Vibegron | 62 |
| Trospium Chloride | 36 |
| Nitrofurantoin Nitrofurantoin Macrocrystal | 27 |
| Solifenacin Succinate | 23 |
| Methenamine Hippurate | 21 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 21 |
| Trimethoprim | 12 |
| Clobetasol Propionate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician in NC →
All providers in North Carolina →
Compare specialties →
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician Overview
How Marcella Willis-Gray fits within the Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician landscape nationally.
121
Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician Providers in US
29
States with Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician
1,181
Avg Claims per Provider
Marcella Willis-Gray's 497 claims are below the specialty average of 1,181.
Nationwide Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Willis-Gray, both outside North Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2011)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Frequently Asked Questions
What is Marcella Willis-Gray's specialty? ▼
Marcella Willis-Gray specializes in Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician and practices in Chapel Hill, North Carolina.
How much does Marcella Willis-Gray prescribe under Medicare Part D? ▼
In 2024, Marcella Willis-Gray wrote 497 Medicare Part D claims totaling $119K in drug costs for 147 beneficiaries.
Where is Marcella Willis-Gray located? ▼
Marcella Willis-Gray is located at 3032 OLD CLINIC BLDG, Chapel Hill, NC, 27599. Phone: (919) 966-4717.
What is Marcella Willis-Gray's NPI number? ▼
Marcella Willis-Gray's National Provider Identifier (NPI) is 1821388034, issued on 04/10/2011.
Does Marcella Willis-Gray prescribe more brand-name or generic drugs? ▼
Marcella Willis-Gray's prescribing is 38% brand-name and 62% generic drugs by claim count, with $106K in brand drug costs.
How many Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician providers are there in the US? ▼
There are 121 Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician providers across 29 states in the US. The average Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician provider writes 1,181 Medicare Part D claims per year.
What drugs does Marcella Willis-Gray prescribe most often? ▼
Based on 2024 Medicare Part D data, Marcella Willis-Gray's most frequently prescribed drugs include Myrbetriq, Estradiol, Gemtesa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marcella Willis-Gray accept Medicare? ▼
Marcella Willis-Gray appears in CMS Medicare data with 497 Part D claims and 147 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marcella Willis-Gray's credentials? ▼
Marcella Willis-Gray's NPI is 1821388034. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.