2026 NPPES data General Practice Physician NPI 1639460116 M.D.
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WILLIAM GRIMES, M.D.

General Practice Physician in COLUMBIA, South Carolina. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
5K
Medicare Part D claims · 456 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.0384/100
▼ 0 pts below national avg 83.1 · [object Object]
Industry payments
$662.94
28 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: WILLIAM GRIMES, M.D. is a General Practice Physician ([object Object]) practicing in COLUMBIA, South Carolina with a Medicare Part D prescribing footprint of 5K claims across 456 beneficiaries — 9% brand-name prescribing . Their CMS MIPS Final Score of 83.0384/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $662.94 across 28 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: WILLIAM GRIMES, M.D. reported a CMS MIPS final score of 83.0384 out of 100, below the 83.1 national average, and filed 5,416 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

WILLIAM GRIMES, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

WILLIAM GRIMES, M.D. at a glance

Near national average

NPI registry status

Active

Issued 05/02/2011

NPI 1639460116

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

5,416 89% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

MIPS final score

83.0384/100 0.061599999999998545% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in South Carolina

How General Practice Physician compares to other specialties among South Carolina providers

South Carolina providers

General Practice Physician share within South Carolina

1. General Practice Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Physician share within South Carolina

Medicare quality performance — MIPS

WILLIAM GRIMES, M.D.'s 2023 MIPS final score plotted against the General Practice Physician national average

Near national average
MIPS Final Score
83.0384/100
vs 83.1 national avg · 2023 performance year

MIPS final score (General Practice Physician) — 83.0384/100 vs national avg 83.1

0%100%National avg83%83%
MIPS final score (General Practice Physician) — 83.0384/100 vs national avg 83.1

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).

WILLIAM GRIMES, M.D. is a General Practice Physician provider practicing in COLUMBIA, South Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1639460116. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

WILLIAM GRIMES, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 76 POLO RD, COLUMBIA, SC, 29223, with a listed phone of (036) 997-2558. NPI 1639460116 was issued on 05/02/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRIMES most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 5,416 prescription claims written by this provider, covering 456 Medicare beneficiaries and totaling roughly $435K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 0.9%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 83.0384/100 for the 2023 performance year (Quality 80.4541, Cost 72.1739), compared with the national average of 83.1.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

76 POLO RD
COLUMBIA, SC 29223

Provider Details

NPI 1639460116
Specialty General Practice Physician
Credentials M.D.
Gender Male
NPI Issued 05/02/2011

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

83.0384
Final Score
Avg: 83.1
80.4541
Quality
72.1739
Cost
89
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where WILLIAM GRIMES, M.D. 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.

LEXINGTON HEALTH INC
COLUMBIA, SC

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for WILLIAM GRIMES, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$663

Largest payer

Dexcom, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Generic-heavy

WILLIAM GRIMES, M.D. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 5,416 2023 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 2023.

5,416
Total Claims
$435K
Total Drug Cost
456
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
13,267
Total Day Supply
389,060
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$319K
Generic Drug Cost
$112K
Opioid Claims
51 (0.9% rate)
Antibiotic Claims
135

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
0.90
Gender Split
46% female / 54% male
Age Distribution
<65: 43, 65-74: 262, 75-84: 134, 85+: 17

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Rosuvastatin Calcium
369
Atorvastatin Calcium
331
Amlodipine Besylate
295
Omeprazole
208
Lisinopril
177
Hydrochlorothiazide
165
Metoprolol Succinate
161
Levothyroxine Sodium
149
Losartan Potassium
130
Metformin Hcl Er
Metformin Hcl
124

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

General Practice Physician Overview

How WILLIAM GRIMES, M.D. fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

WILLIAM GRIMES, M.D.'s 5,416 claims are above the specialty average of 2,872.

Nearby General Practice Physician Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as GRIMES.

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM GRIMES, M.D.'s specialty?
WILLIAM GRIMES, M.D. specializes in General Practice Physician and practices in COLUMBIA, South Carolina. Credentials: M.D..
How much does WILLIAM GRIMES, M.D. prescribe under Medicare Part D?
In 2023, WILLIAM GRIMES, M.D. wrote 5,416 Medicare Part D claims totaling $435K in drug costs for 456 beneficiaries.
What is WILLIAM GRIMES, M.D.'s Medicare quality score?
WILLIAM GRIMES, M.D. has a CMS MIPS Final Score of 83.0384/100 (Quality: 80.4541, Cost: 72.1739). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is WILLIAM GRIMES, M.D. located?
WILLIAM GRIMES, M.D. is located at 76 POLO RD, COLUMBIA, SC, 29223. Phone: (036) 997-2558.
What is WILLIAM GRIMES, M.D.'s NPI number?
WILLIAM GRIMES, M.D.'s National Provider Identifier (NPI) is 1639460116, issued on 05/02/2011.
Does WILLIAM GRIMES, M.D. prescribe more brand-name or generic drugs?
WILLIAM GRIMES, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $319K in brand drug costs.
Does WILLIAM GRIMES, M.D. prescribe opioids?
Yes, WILLIAM GRIMES, M.D. had 51 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does WILLIAM GRIMES, M.D. prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM GRIMES, M.D.'s most frequently prescribed drugs include Rosuvastatin Calcium, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM GRIMES, M.D. accept Medicare?
WILLIAM GRIMES, M.D. appears in CMS Medicare data with 5,416 Part D claims and 456 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM GRIMES, M.D.'s credentials?
WILLIAM GRIMES, M.D.'s NPI is 1639460116 with credentials M.D.. 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

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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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 April 2026 (NPPES) / 2023 (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