2026 NPPES data Obstetrics & Gynecology Physician NPI 1255325189 M.D.
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MARGARET SMOLLEN, M.D.

Obstetrics & Gynecology Physician in IOWA CITY, Iowa. 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
177
Medicare Part D claims · 68 beneficiaries · Obstetrics & Gynecology Physician avg: 179

What the federal data shows

MARGARET SMOLLEN, M.D. filed 177 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in IOWA CITY, Iowa.

177
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.

MARGARET SMOLLEN, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

177 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)

MARGARET SMOLLEN, 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).

What does the federal data show about MARGARET SMOLLEN, M.D.?

Quality data not reported

NPI registry status

Active

Issued 09/07/2005

NPI 1255325189

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

177 1% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Iowa

How Obstetrics & Gynecology Physician compares to other specialties among Iowa providers

Iowa providers

Obstetrics & Gynecology Physician share within Iowa

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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).

MARGARET SMOLLEN, M.D. appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding M.D. credentials at 200 HAWKINS DR, IOWA CITY, IA, 52242, with a listed phone of (319) 356-2294. NPI 1255325189 was issued on 09/07/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SMOLLEN 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 177 prescription claims written by this provider, covering 68 Medicare beneficiaries and totaling roughly $15K 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.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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 1255325189
Specialty Obstetrics & Gynecology Physician
Credentials M.D.
Gender Female
NPI Issued 09/07/2005

Hospital and facility affiliations

Facilities where MARGARET SMOLLEN, 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.

STATE UNIVERSITY OF IOWA
IOWA CITY, IA

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.

177
Total Claims
$15K
Total Drug Cost
68
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
326
Total Day Supply
8,736
Generic Drug Cost
$8K
Antibiotic Claims
17

Patient Demographics

Average Patient Age
69.4 years
Avg HCC Risk Score
0.67

Top Prescribed Drugs (Medicare Part D)

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

What MARGARET SMOLLEN, M.D. 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
Estradiol
28
Clobetasol Propionate
20
Imvexxy
Estradiol
15

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

Obstetrics & Gynecology Physician Overview

How MARGARET SMOLLEN, M.D. fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

MARGARET SMOLLEN, M.D.'s 177 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Iowa

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

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARGARET SMOLLEN, M.D.'s specialty?
MARGARET SMOLLEN, M.D. specializes in Obstetrics & Gynecology Physician and practices in IOWA CITY, Iowa. Credentials: M.D..
How much does MARGARET SMOLLEN, M.D. prescribe under Medicare Part D?
In 2023, MARGARET SMOLLEN, M.D. wrote 177 Medicare Part D claims totaling $15K in drug costs for 68 beneficiaries.
Where is MARGARET SMOLLEN, M.D. located?
MARGARET SMOLLEN, M.D. is located at 200 HAWKINS DR, IOWA CITY, IA, 52242. Phone: (319) 356-2294.
What is MARGARET SMOLLEN, M.D.'s NPI number?
MARGARET SMOLLEN, M.D.'s National Provider Identifier (NPI) is 1255325189, issued on 09/07/2005.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does MARGARET SMOLLEN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, MARGARET SMOLLEN, M.D.'s most frequently prescribed drugs include Estradiol, Clobetasol Propionate, Imvexxy. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARGARET SMOLLEN, M.D. accept Medicare?
MARGARET SMOLLEN, M.D. appears in CMS Medicare data with 177 Part D claims and 68 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARGARET SMOLLEN, M.D.'s credentials?
MARGARET SMOLLEN, M.D.'s NPI is 1255325189 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