2026 NPPES data Hospitalist Physician NPI 1356638068 D.O.
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ROBERT GREENWOOD, D.O.

Hospitalist Physician in FORT WAINWRIGHT, Alaska. 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
122
Medicare Part D claims · 50 beneficiaries · Hospitalist Physician avg: 888

What the federal data shows

ROBERT GREENWOOD, D.O. filed 122 Medicare Part D claims in 2023 as a Hospitalist Physician in FORT WAINWRIGHT, Alaska.

122
Part D claims, 2023
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.

ROBERT GREENWOOD, D.O.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

122 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

ROBERT GREENWOOD, D.O. 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).

What does the federal data show about ROBERT GREENWOOD, D.O.?

Quality data not reported

NPI registry status

Active

Issued 07/01/2011

NPI 1356638068

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

122 86% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Alaska

How Hospitalist Physician compares to other specialties among Alaska providers

Alaska providers

Hospitalist Physician share within Alaska

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Hospitalist 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).

ROBERT GREENWOOD, D.O. appears in the CMS NPPES registry as a Hospitalist Physician provider holding D.O. credentials at 1060 GAFFNEY RD, FORT WAINWRIGHT, AK, 99703, with a listed phone of (907) 361-5957. NPI 1356638068 was issued on 07/01/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREENWOOD 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 122 prescription claims written by this provider, covering 50 Medicare beneficiaries and totaling roughly $9K in drug spend. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

1060 GAFFNEY RD
FORT WAINWRIGHT, AK 99703

Provider Details

NPI 1356638068
Specialty Hospitalist Physician
Credentials D.O.
Gender Male
NPI Issued 07/01/2011

Hospital and facility affiliations

Facilities where ROBERT GREENWOOD, D.O. 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.

TANANA VALLEY CLINIC LLC
FAIRBANKS, AK

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

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

122
Total Claims
$9K
Total Drug Cost
50
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
127
Total Day Supply
2,389
Generic Drug Cost
$789
Antibiotic Claims
27

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.91
Gender Split
36% female / 64% 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
Eliquis
Apixaban
22

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

Hospitalist Physician Overview

How ROBERT GREENWOOD, D.O. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

ROBERT GREENWOOD, D.O.'s 122 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Alaska

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

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT GREENWOOD, D.O.'s specialty?
ROBERT GREENWOOD, D.O. specializes in Hospitalist Physician and practices in FORT WAINWRIGHT, Alaska. Credentials: D.O..
How much does ROBERT GREENWOOD, D.O. prescribe under Medicare Part D?
In 2023, ROBERT GREENWOOD, D.O. wrote 122 Medicare Part D claims totaling $9K in drug costs for 50 beneficiaries.
Where is ROBERT GREENWOOD, D.O. located?
ROBERT GREENWOOD, D.O. is located at 1060 GAFFNEY RD, FORT WAINWRIGHT, AK, 99703. Phone: (907) 361-5957.
What is ROBERT GREENWOOD, D.O.'s NPI number?
ROBERT GREENWOOD, D.O.'s National Provider Identifier (NPI) is 1356638068, issued on 07/01/2011.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does ROBERT GREENWOOD, D.O. prescribe most often?
Based on 2023 Medicare Part D data, ROBERT GREENWOOD, D.O.'s most frequently prescribed drugs include Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT GREENWOOD, D.O. accept Medicare?
ROBERT GREENWOOD, D.O. appears in CMS Medicare data with 122 Part D claims and 50 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT GREENWOOD, D.O.'s credentials?
ROBERT GREENWOOD, D.O.'s NPI is 1356638068 with credentials D.O.. 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