2026 NPPES data Gynecology Physician NPI 1063439644 DO
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AMY MULCASTER, DO

Gynecology Physician in PORTLAND, Oregon. 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
93
Medicare Part D claims · 34 beneficiaries · Gynecology Physician avg: 295
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

AMY MULCASTER, DO filed 93 Medicare Part D claims in 2023 as a Gynecology Physician in PORTLAND, Oregon, prescribing 74% generic.

93
Part D claims, 2023
74%
generic prescribing
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.

AMY MULCASTER, DO's Medicare Part D volume vs every U.S. prescriber

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

93 0th percentile higher than 0% 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)

AMY MULCASTER, DO 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 AMY MULCASTER, DO?

Quality data not reported

NPI registry status

Active

Issued 07/17/2006

NPI 1063439644

Primary specialty

Gynecology Physician

Niche

3,902 US NPIs in this specialty

Medicare Part D claims

93 68% vs specialty avg

2023 prescription claims

Specialty avg: 295

Specialty distribution in Oregon

How Gynecology Physician compares to other specialties among Oregon providers

Oregon providers

Gynecology Physician share within Oregon

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

Specialty board-certification context

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

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

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

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

AMY MULCASTER, DO appears in the CMS NPPES registry as a Gynecology Physician provider holding DO credentials at 800 SW 13TH AVE, PORTLAND, OR, 97205, with a listed phone of (503) 221-0161. NPI 1063439644 was issued on 07/17/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MULCASTER 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 93 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $15K in drug spend, split 26% brand-name and 74% 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.

Gynecology Physician is a narrow specialty nationwide, with 3,902 enrolled providers across 53 states and an average of 295 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

800 SW 13TH AVE
PORTLAND, OR 97205

Provider Details

NPI 1063439644
Specialty Gynecology Physician
Credentials DO
Gender Female
NPI Issued 07/17/2006

Hospital and facility affiliations

Facilities where AMY MULCASTER, DO 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.

PORTLAND CLINIC
BEAVERTON, OR

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 · Above average

AMY MULCASTER, DO — brand share 26.0%
Specialty average (est.)

26% brand-name claims vs 74% generic, on 93 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.

93
Total Claims
$15K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
236
Total Day Supply
6,755
Brand vs Generic
26% brand / 74% generic
Brand Drug Cost
$12K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
74.5 years
Avg HCC Risk Score
0.72
Gender Split
100% female / 0% male
Age Distribution
<65: 0, 65-74: 21, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Estradiol
30
Clobetasol Propionate
11

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

Gynecology Physician Overview

How AMY MULCASTER, DO fits within the Gynecology Physician landscape nationally.

3,902
Gynecology Physician Providers in US
53
States with Gynecology Physician
295
Avg Claims per Provider

AMY MULCASTER, DO's 93 claims are below the specialty average of 295.

Nearby Gynecology Physician Providers in Oregon

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

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

Frequently Asked Questions

What is AMY MULCASTER, DO's specialty?
AMY MULCASTER, DO specializes in Gynecology Physician and practices in PORTLAND, Oregon. Credentials: DO.
How much does AMY MULCASTER, DO prescribe under Medicare Part D?
In 2023, AMY MULCASTER, DO wrote 93 Medicare Part D claims totaling $15K in drug costs for 34 beneficiaries.
Where is AMY MULCASTER, DO located?
AMY MULCASTER, DO is located at 800 SW 13TH AVE, PORTLAND, OR, 97205. Phone: (503) 221-0161.
What is AMY MULCASTER, DO's NPI number?
AMY MULCASTER, DO's National Provider Identifier (NPI) is 1063439644, issued on 07/17/2006.
Does AMY MULCASTER, DO prescribe more brand-name or generic drugs?
AMY MULCASTER, DO's prescribing is 26% brand-name and 74% generic drugs by claim count, with $12K in brand drug costs.
How many Gynecology Physician providers are there in the US?
There are 3,902 Gynecology Physician providers across 53 states in the US. The average Gynecology Physician provider writes 295 Medicare Part D claims per year.
What drugs does AMY MULCASTER, DO prescribe most often?
Based on 2023 Medicare Part D data, AMY MULCASTER, DO's most frequently prescribed drugs include Estradiol, Clobetasol Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AMY MULCASTER, DO accept Medicare?
AMY MULCASTER, DO appears in CMS Medicare data with 93 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AMY MULCASTER, DO's credentials?
AMY MULCASTER, DO's NPI is 1063439644 with credentials DO. 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