2026 NPPES data Family Medicine Physician NPI 1891892477 MD
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WILLIAM HAMILTON, MD

Family Medicine Physician in CALHOUN, Georgia. 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
8K
Medicare Part D claims · 385 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.0866/100
▼ 0 pts below national avg 83.1 · [object Object]
Industry payments
$419.06
23 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

WILLIAM HAMILTON, MD reported a CMS MIPS final score of 83.0866/100 — below the 83.1 national average — and filed 7,780 Medicare Part D claims in 2023.

83.0866/100
MIPS score · 0 vs avg
8K
Part D claims, 2023
88%
generic prescribing
Likely
board-certified (heuristic)

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.

WILLIAM HAMILTON, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

83 42nd percentile higher than 42% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

WILLIAM HAMILTON, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — 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 WILLIAM HAMILTON, MD?

Near national average

NPI registry status

Active

Issued 09/17/2006

NPI 1891892477

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

7,780 128% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

MIPS final score

83.0866/100 0.013399999999990087% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Georgia

How Family Medicine Physician compares to other specialties among Georgia providers

Georgia providers

Family Medicine Physician share within Georgia

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Georgia

Medicare quality performance — MIPS

WILLIAM HAMILTON, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average

Near national average
MIPS Final Score
83.0866/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Family Medicine Physician) — 83.0866/100 vs national avg 83.1

0%100%National avg83%83.1%
MIPS final score (Family Medicine Physician) — 83.0866/100 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 HAMILTON, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 400 TIMMS RD NE, CALHOUN, GA, 30701, with a listed phone of (706) 625-0022. NPI 1891892477 was issued on 09/17/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HAMILTON 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 7,780 prescription claims written by this provider, covering 385 Medicare beneficiaries and totaling roughly $627K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.9%. 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 83.0866/100 for the 2023 performance year (Quality 68.9068, Cost 69.5763), compared with the national average of 83.1.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

400 TIMMS RD NE
CALHOUN, GA 30701

Provider Details

NPI 1891892477
Specialty Family Medicine Physician
Credentials MD
Gender Male
NPI Issued 09/17/2006

CMS Quality Score (MIPS)

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

83.0866
Final Score
Avg: 83.1
68.9068
Quality
69.5763
Cost
100
Promoting Interoperability

Reporting: Group practice

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 HAMILTON, MD. Source: openpaymentsdata.cms.gov.

Total received

$419

Largest payer

Amgen 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 · Typical

WILLIAM HAMILTON, MD — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 7,780 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.

7,780
Total Claims
$627K
Total Drug Cost
385
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14,923
Total Day Supply
436,005
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$538K
Generic Drug Cost
$84K
Opioid Claims
150 (1.9% rate)
Antibiotic Claims
54

Patient Demographics

Average Patient Age
70.7 years
Avg HCC Risk Score
1.29
Gender Split
43% female / 57% male
Age Distribution
<65: 88, 65-74: 154, 75-84: 106, 85+: 37

Top Prescribed Drugs (Medicare Part D)

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

What WILLIAM HAMILTON, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
442
Lisinopril
396
Levothyroxine Sodium
374
Omeprazole
332
Amlodipine Besylate
310
Tamsulosin Hcl
222
Metformin Hcl
201
Trazodone Hcl
196
Metoprolol Tartrate
186
Losartan Potassium
182

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

Family Medicine Physician Overview

How WILLIAM HAMILTON, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

WILLIAM HAMILTON, MD's 7,780 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Georgia

Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as HAMILTON.

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM HAMILTON, MD's specialty?
WILLIAM HAMILTON, MD specializes in Family Medicine Physician and practices in CALHOUN, Georgia. Credentials: MD.
How much does WILLIAM HAMILTON, MD prescribe under Medicare Part D?
In 2023, WILLIAM HAMILTON, MD wrote 7,780 Medicare Part D claims totaling $627K in drug costs for 385 beneficiaries.
What is WILLIAM HAMILTON, MD's Medicare quality score?
WILLIAM HAMILTON, MD has a CMS MIPS Final Score of 83.0866/100 (Quality: 68.9068, Cost: 69.5763). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is WILLIAM HAMILTON, MD located?
WILLIAM HAMILTON, MD is located at 400 TIMMS RD NE, CALHOUN, GA, 30701. Phone: (706) 625-0022.
What is WILLIAM HAMILTON, MD's NPI number?
WILLIAM HAMILTON, MD's National Provider Identifier (NPI) is 1891892477, issued on 09/17/2006.
Does WILLIAM HAMILTON, MD prescribe more brand-name or generic drugs?
WILLIAM HAMILTON, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $538K in brand drug costs.
Does WILLIAM HAMILTON, MD prescribe opioids?
Yes, WILLIAM HAMILTON, MD had 150 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does WILLIAM HAMILTON, MD prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM HAMILTON, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM HAMILTON, MD accept Medicare?
WILLIAM HAMILTON, MD appears in CMS Medicare data with 7,780 Part D claims and 385 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM HAMILTON, MD's credentials?
WILLIAM HAMILTON, MD's NPI is 1891892477 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

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