NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1639468580 M.D.
Verify on CMS → William Rivers, M.D.
Physical Medicine & Rehabilitation Physician in Marietta, Georgia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,618 in Physical Medicine & Rehabilitation 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 · 237 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 793
Generic prescribing
80%
generic claims · 19% 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
William Rivers, M.D. filed 7,301 Medicare Part D claims in 2024 as a Physical Medicine & Rehabilitation Physician in Marietta, Georgia, prescribing 80% generic.
- 7K
- Part D claims, 2024
- 80%
- generic prescribing
- ≥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 William Rivers, M.D.
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 1639468580), first enumerated 03/31/2011.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 7,301 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- 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 1639468580 · Physical Medicine & Rehabilitation Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1639468580
- ENUM-MID 2011
- TAX-MID 16K Physical Medicine
- RX-MID 7,301
- BOOK-THIN 312 in Georgia
- PHOTO-ENUM Jonathan Moran · 2011
William Rivers, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
7,301 ≥ 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-eligible specialty (heuristic, not verified)
William Rivers, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Rivers, M.D.?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
7,301 9× vs specialty avg
Specialty distribution in Georgia
How Physical Medicine & Rehabilitation Physician compares to other specialties among Georgia 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 Physical Medicine & Rehabilitation 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 | 1639468580 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/31/2011 |
Brand vs generic prescribing mix · Typical
William Rivers, M.D. - brand share 19.0%
Physical Medicine & Rehabilitation Physician average
19% brand-name claims vs 80% generic, on 7,301 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.
7,301
Total Claims
$560K
Total Drug Cost
237
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,327.833
- Total Day Supply
- 162,086
- Brand vs Generic
- 19% brand / 80% generic
- Brand Drug Cost
- $384K
- Generic Drug Cost
- $176K
- Opioid Claims
- 590 (8.1% rate)
- Antibiotic Claims
- 119
Patient Demographics
- Average Patient Age
- 75.4 years
- Avg HCC Risk Score
- 3.13
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 25, 65-74: 80, 75-84: 84, 85+: 48
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What William Rivers, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Eliquis
Eliquis
457 claims
- Atorvastatin Calcium
Atorvastatin Calcium
338 claims
- Oxycodone Hcl
Oxycodone Hcl
259 claims
- Gabapentin
Gabapentin
222 claims
- Levothyroxine Sodium
Levothyroxine Sodium
220 claims
- Furosemide
Furosemide
209 claims
- Pantoprazole Sodium
Pantoprazole Sodium
208 claims
- Tamsulosin Hcl 168
Tamsulosin Hcl
168 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 457 |
| Atorvastatin Calcium | 338 |
| Oxycodone Hcl | 259 |
| Gabapentin | 222 |
| Levothyroxine Sodium | 220 |
| Furosemide | 209 |
| Pantoprazole Sodium | 208 |
| Tamsulosin Hcl | 168 |
| Metoprolol Tartrate | 146 |
| Carvedilol | 134 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in GA →
All providers in Georgia →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How William Rivers, M.D. fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,618
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
793
Avg Claims per Provider
William Rivers, M.D.'s 7,301 claims are above the specialty average of 793.
Nationwide Physical Medicine & Rehabilitation Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Rivers, both outside Georgia 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.
Nearby Physical Medicine & Rehabilitation Physician Providers in Georgia
Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as Rivers.
One of 312 Physical Medicine & Rehabilitation Physician providers enrolled in Georgia, 5 are shown here.
Dr. Gregorio Abad
MD
Dublin, GA
Jasmin Abrahamsen
PT
Woodstock, GA
Joy Adams
PT
Jasper, GA
Dr. Bamidele Adeyemo
M.D.
Atlanta, GA
Ismailu Agbaje
PHD MD
Newnan, GA
Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is William Rivers, M.D.'s specialty? ▼
William Rivers, M.D. specializes in Physical Medicine & Rehabilitation Physician and practices in Marietta, Georgia. Credentials: M.D..
How much does William Rivers, M.D. prescribe under Medicare Part D? ▼
In 2024, William Rivers, M.D. wrote 7,301 Medicare Part D claims totaling $560K in drug costs for 237 beneficiaries.
Where is William Rivers, M.D. located? ▼
William Rivers, M.D. is located at 3225 SHALLOWFORD RD STE 500, Marietta, GA, 30062. Phone: (770) 579-9000.
What is William Rivers, M.D.'s NPI number? ▼
William Rivers, M.D.'s National Provider Identifier (NPI) is 1639468580, issued on 03/31/2011.
Does William Rivers, M.D. prescribe more brand-name or generic drugs? ▼
William Rivers, M.D.'s prescribing is 19% brand-name and 80% generic drugs by claim count, with $384K in brand drug costs.
Does William Rivers, M.D. prescribe opioids? ▼
Yes, William Rivers, M.D. had 590 opioid claims in 2024 with an opioid prescribing rate of 8.1%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,618 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 793 Medicare Part D claims per year.
What drugs does William Rivers, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, William Rivers, M.D.'s most frequently prescribed drugs include Eliquis, Atorvastatin Calcium, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Rivers, M.D. accept Medicare? ▼
William Rivers, M.D. appears in CMS Medicare data with 7,301 Part D claims and 237 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Rivers, M.D.'s credentials? ▼
William Rivers, M.D.'s NPI is 1639468580 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
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.