2026 NPPES data Internal Medicine Physician NPI 1639387236 M.D.
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RYAN BUCHHOLZ, M.D.

Internal Medicine Physician in WASHINGTON, District of Columbia. 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
1K
Medicare Part D claims · 83 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: RYAN BUCHHOLZ, M.D. is a Internal Medicine Physician ([object Object]) practicing in WASHINGTON, District of Columbia with a Medicare Part D prescribing footprint of 1K claims across 83 beneficiaries — 20% brand-name prescribing .

What stands out: RYAN BUCHHOLZ, M.D. filed 1,206 Medicare Part D claims in 2023 across WASHINGTON, District of Columbia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

RYAN BUCHHOLZ, M.D. 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).

RYAN BUCHHOLZ, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 05/18/2007

NPI 1639387236

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,206 56% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in District of Columbia

How Internal Medicine Physician compares to other specialties among District of Columbia providers

District of Columbia providers

Internal Medicine Physician share within District of Columbia

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

RYAN BUCHHOLZ, M.D. is a Internal Medicine Physician provider practicing in WASHINGTON, District of Columbia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1639387236. 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.

RYAN BUCHHOLZ, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 3020 14TH ST NW, WASHINGTON, DC, 20009, with a listed phone of (202) 745-4300. NPI 1639387236 was issued on 05/18/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BUCHHOLZ 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 1,206 prescription claims written by this provider, covering 83 Medicare beneficiaries and totaling roughly $232K in drug spend, split 20% brand-name and 80% generic by claim count. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

3020 14TH ST NW
WASHINGTON, DC 20009

Provider Details

NPI 1639387236
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 05/18/2007

Hospital and facility affiliations

Facilities where RYAN BUCHHOLZ, 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.

UNITY HEALTH CARE INC.
WASHINGTON, DC

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

RYAN BUCHHOLZ, M.D. — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 1,206 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.

1,206
Total Claims
$232K
Total Drug Cost
83
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,558
Total Day Supply
75,964
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$209K
Generic Drug Cost
$22K

Patient Demographics

Average Patient Age
70.0 years
Avg HCC Risk Score
1.64
Gender Split
57% female / 43% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
148
Metformin Hcl
74
Amlodipine Besylate
59
Hydrochlorothiazide
54
Lisinopril
54
Lisinopril-Hydrochlorothiazide
Lisinopril/Hydrochlorothiazide
42
Gabapentin
34
Ozempic
Semaglutide
33
Jardiance
Empagliflozin
30
Fluticasone Propionate
27

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

Internal Medicine Physician Overview

How RYAN BUCHHOLZ, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

RYAN BUCHHOLZ, M.D.'s 1,206 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in District of Columbia

Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as BUCHHOLZ.

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

Frequently Asked Questions

What is RYAN BUCHHOLZ, M.D.'s specialty?
RYAN BUCHHOLZ, M.D. specializes in Internal Medicine Physician and practices in WASHINGTON, District of Columbia. Credentials: M.D..
How much does RYAN BUCHHOLZ, M.D. prescribe under Medicare Part D?
In 2023, RYAN BUCHHOLZ, M.D. wrote 1,206 Medicare Part D claims totaling $232K in drug costs for 83 beneficiaries.
Where is RYAN BUCHHOLZ, M.D. located?
RYAN BUCHHOLZ, M.D. is located at 3020 14TH ST NW, WASHINGTON, DC, 20009. Phone: (202) 745-4300.
What is RYAN BUCHHOLZ, M.D.'s NPI number?
RYAN BUCHHOLZ, M.D.'s National Provider Identifier (NPI) is 1639387236, issued on 05/18/2007.
Does RYAN BUCHHOLZ, M.D. prescribe more brand-name or generic drugs?
RYAN BUCHHOLZ, M.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $209K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does RYAN BUCHHOLZ, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RYAN BUCHHOLZ, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metformin Hcl, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RYAN BUCHHOLZ, M.D. accept Medicare?
RYAN BUCHHOLZ, M.D. appears in CMS Medicare data with 1,206 Part D claims and 83 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RYAN BUCHHOLZ, M.D.'s credentials?
RYAN BUCHHOLZ, M.D.'s NPI is 1639387236 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.
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