NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1437595444 MD
Verify on CMS → Meredith Gilliam, MD
Geriatric Medicine (Internal Medicine) 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 4,215 in Geriatric Medicine (Internal Medicine) 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
7K
Medicare Part D claims · 683 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
87%
generic claims · 12% 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
Meredith Gilliam, MD filed 7,178 Medicare Part D claims in 2024 as a Geriatric Medicine (Internal Medicine) Physician in Chapel Hill, North Carolina, prescribing 87% generic.
- 7K
- Part D claims, 2024
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥96th
- 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 Meredith Gilliam, MD
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 1437595444), first enumerated 05/16/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 7,178 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
5 CMS Care Compare hospital affiliations 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.
CMS NPPES provider registry desk
NPI 1437595444 · Geriatric Medicine (Internal Medicine) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1437595444
- ENUM-MID 2013
- TAX-NARROW 4,215
- RX-MID 7,178
- BOOK-THIN 144 in North Carolina
- PHOTO-ENUM Maria De Los Angeles… · 2013
Meredith Gilliam, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
7,178 ≥ 96th percentile 96% 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)
Meredith Gilliam, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 5 hospital affiliations - 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 Meredith Gilliam, MD?
Quality data not reportedPrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
7,178 62% vs specialty avg
Specialty distribution in North Carolina
How Geriatric Medicine (Internal Medicine) 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 Geriatric Medicine (Internal Medicine) 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 | 1437595444 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/16/2013 |
Hospital and facility affiliations
Facilities where Meredith Gilliam, MD 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.
According to CMS billing records, Meredith Gilliam, MD is affiliated with 5 Medicare-billing facilities.
Carolina Physical Therapy Associates LLC
Chapel Hill, NC
Galloway Ridge, Inc
Pittsboro, NC
Legacy Healthcare Services Inc
Durham, NC
The Cedars OF Chapel Hill Club Inc
Chapel Hill, NC
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 · Typical
Meredith Gilliam, MD - brand share 12.0%
Geriatric Medicine (Internal Medicine) Physician average
12% brand-name claims vs 87% generic, on 7,178 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.
7,178
Total Claims
$685K
Total Drug Cost
683
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 16,000.7
- Total Day Supply
- 465,575
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $565K
- Generic Drug Cost
- $118K
- Opioid Claims
- 139 (1.9% rate)
- Antibiotic Claims
- 124
Patient Demographics
- Average Patient Age
- 79.6 years
- Avg HCC Risk Score
- 1.33
- Gender Split
- 70% female / 30% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Meredith Gilliam, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
448 claims
- Losartan Potassium
Losartan Potassium
321 claims
- Levothyroxine Sodium
Levothyroxine Sodium
296 claims
- Amlodipine Besylate
Amlodipine Besylate
278 claims
- Hydrochlorothiazide
Hydrochlorothiazide
239 claims
- Omeprazole
Omeprazole
233 claims
- Lisinopril
Lisinopril
207 claims
- Gabapentin
Gabapentin
206 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 448 |
| Losartan Potassium | 321 |
| Levothyroxine Sodium | 296 |
| Amlodipine Besylate | 278 |
| Hydrochlorothiazide | 239 |
| Omeprazole | 233 |
| Lisinopril | 207 |
| Gabapentin | 206 |
| Eliquis Apixaban | 183 |
| Rosuvastatin Calcium | 160 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in NC →
All providers in North Carolina →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Meredith Gilliam, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,215
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,420
Avg Claims per Provider
Meredith Gilliam, MD's 7,178 claims are above the specialty average of 4,420.
Nationwide Geriatric Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Gilliam, both outside North Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Gilliam.
One of 144 Geriatric Medicine (Internal Medicine) Physician providers enrolled in North Carolina, 5 are shown here.
Frequently Asked Questions
What is Meredith Gilliam, MD's specialty? ▼
Meredith Gilliam, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Chapel Hill, North Carolina. Credentials: MD.
How much does Meredith Gilliam, MD prescribe under Medicare Part D? ▼
In 2024, Meredith Gilliam, MD wrote 7,178 Medicare Part D claims totaling $685K in drug costs for 683 beneficiaries.
Where is Meredith Gilliam, MD located? ▼
Meredith Gilliam, MD is located at 6011 FARRINGTON RD STE 101, Chapel Hill, NC, 27517. Phone: (849) 746-5999.
What is Meredith Gilliam, MD's NPI number? ▼
Meredith Gilliam, MD's National Provider Identifier (NPI) is 1437595444, issued on 05/16/2013.
Does Meredith Gilliam, MD prescribe more brand-name or generic drugs? ▼
Meredith Gilliam, MD's prescribing is 12% brand-name and 87% generic drugs by claim count, with $565K in brand drug costs.
Does Meredith Gilliam, MD prescribe opioids? ▼
Yes, Meredith Gilliam, MD had 139 opioid claims in 2024 with an opioid prescribing rate of 1.9%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,215 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,420 Medicare Part D claims per year.
What drugs does Meredith Gilliam, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Meredith Gilliam, MD's most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Meredith Gilliam, MD accept Medicare? ▼
Meredith Gilliam, MD appears in CMS Medicare data with 7,178 Part D claims and 683 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Meredith Gilliam, MD's credentials? ▼
Meredith Gilliam, MD's NPI is 1437595444 with credentials MD. 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.