2026 NPPES data Internal Medicine Physician NPI 1609858919 MD
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Douglas Somers, MD

Internal Medicine Physician in Iowa City, Iowa. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 172,858 in Internal Medicine 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
582
Medicare Part D claims · 86 beneficiaries · Internal Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Douglas Somers, MD filed 582 Medicare Part D claims in 2023 as a Internal Medicine Physician in Iowa City, Iowa.

582
Part D claims, 2023

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.

Douglas Somers, MD's Medicare Part D volume vs every U.S. prescriber

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

582 Top 34% higher than 66% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

Douglas Somers, MD 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 Douglas Somers, MD?

Quality data not reported

NPI registry status

Active

Issued 11/14/2005

NPI 1609858919

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

582 79% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Iowa

How Internal Medicine Physician compares to other specialties among Iowa providers

Iowa providers

Largest specialties in Iowa (% of in-state providers)

Pharmacist — 6.6%Pharmacist6.6%Physical Therapist — 5.5%Physical Therapist5.5%Mental Health Counselor — 5%Mental Health Counselor5%Family Medicine Physician — 4.8%Family Medicine Physician4.8%Chiropractor — 4.2%Chiropractor4.2%Clinical Social Worker — 4.1%Clinical Social Worker4.1%Internal Medicine Physician — 2.8%Internal Medicine Physician2.8%
Largest specialties in Iowa (% of in-state providers)

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).

Douglas Somers, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 200 HAWKINS DR, Iowa City, IA, 52242, with a listed phone of (319) 356-8252. NPI 1609858919 was issued on 11/14/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Somers 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 582 prescription claims written by this provider, covering 86 Medicare beneficiaries and totaling roughly $95K 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.

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

200 HAWKINS DR
Iowa City, IA 52242

Provider Details

NPI 1609858919
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 11/14/2005

Medicare Part D Prescribing Data

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

582
Total Claims
$95K
Total Drug Cost
86
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,287
Total Day Supply
37,758
Generic Drug Cost
$21K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
68.0 years
Avg HCC Risk Score
4.61
Gender Split
49% female / 51% male

Top Prescribed Drugs (Medicare Part D)

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

What Douglas Somers, 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
Furosemide
98
Jardiance
Empagliflozin
62
Losartan Potassium
48
Calcium Acetate
36
Lisinopril
29
Sevelamer Carbonate
25
Doxazosin Mesylate
19
Carvedilol
17
Hydralazine Hcl
15
Spironolactone
15

* 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 Douglas Somers, MD 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

Douglas Somers, MD's 582 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Iowa

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

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Iowa medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Douglas Somers, MD's specialty?
Douglas Somers, MD specializes in Internal Medicine Physician and practices in Iowa City, Iowa. Credentials: MD.
How much does Douglas Somers, MD prescribe under Medicare Part D?
In 2023, Douglas Somers, MD wrote 582 Medicare Part D claims totaling $95K in drug costs for 86 beneficiaries.
Where is Douglas Somers, MD located?
Douglas Somers, MD is located at 200 HAWKINS DR, Iowa City, IA, 52242. Phone: (319) 356-8252.
What is Douglas Somers, MD's NPI number?
Douglas Somers, MD's National Provider Identifier (NPI) is 1609858919, issued on 11/14/2005.
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 Douglas Somers, MD prescribe most often?
Based on 2023 Medicare Part D data, Douglas Somers, MD's most frequently prescribed drugs include Furosemide, Jardiance, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Douglas Somers, MD accept Medicare?
Douglas Somers, MD appears in CMS Medicare data with 582 Part D claims and 86 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Douglas Somers, MD's credentials?
Douglas Somers, MD's NPI is 1609858919 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.
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

Compiled from official public sources by the PlainDoctor editorial team.