2026 NPPES data Obstetrics & Gynecology Physician NPI 1609222355
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BRENNAN ANDERSON

Obstetrics & Gynecology Physician in NAMPA, Idaho. 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
145
Medicare Part D claims · 34 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: BRENNAN ANDERSON is a Obstetrics & Gynecology Physician ([object Object]) practicing in NAMPA, Idaho with a Medicare Part D prescribing footprint of 145 claims across 34 beneficiaries — 10% brand-name prescribing .

What stands out: BRENNAN ANDERSON filed 145 Medicare Part D claims in 2023 across NAMPA, Idaho. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

BRENNAN ANDERSON 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).

BRENNAN ANDERSON at a glance

Quality data not reported

NPI registry status

Active

Issued 05/12/2016

NPI 1609222355

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

145 19% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Idaho

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

Idaho providers

Obstetrics & Gynecology Physician share within Idaho

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

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).

BRENNAN ANDERSON is a Obstetrics & Gynecology Physician provider practicing in NAMPA, Idaho, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1609222355. 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.

BRENNAN ANDERSON appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider at 3908 E FLAMINGO AVE, NAMPA, ID, 83687, with a listed phone of (208) 442-8035. NPI 1609222355 was issued on 05/12/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ANDERSON 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 145 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $9K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 11.0%. 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

3908 E FLAMINGO AVE
NAMPA, ID 83687

Provider Details

NPI 1609222355
Specialty Obstetrics & Gynecology Physician
Gender Male
NPI Issued 05/12/2016

Brand vs generic prescribing mix · Typical

BRENNAN ANDERSON — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 145 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.

145
Total Claims
$9K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
194
Total Day Supply
4,357
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$6K
Generic Drug Cost
$3K
Opioid Claims
16 (11.0% rate)

Patient Demographics

Average Patient Age
60.8 years
Avg HCC Risk Score
1.02
Gender Split
100% female / 0% male
Age Distribution
<65: 16, 65-74: 13, 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
19
Oxybutynin Chloride Er
Oxybutynin Chloride
16
Ibuprofen
15
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
11

* 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 BRENNAN ANDERSON 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

BRENNAN ANDERSON's 145 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Idaho

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

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

Frequently Asked Questions

What is BRENNAN ANDERSON's specialty?
BRENNAN ANDERSON specializes in Obstetrics & Gynecology Physician and practices in NAMPA, Idaho.
How much does BRENNAN ANDERSON prescribe under Medicare Part D?
In 2023, BRENNAN ANDERSON wrote 145 Medicare Part D claims totaling $9K in drug costs for 34 beneficiaries.
Where is BRENNAN ANDERSON located?
BRENNAN ANDERSON is located at 3908 E FLAMINGO AVE, NAMPA, ID, 83687. Phone: (208) 442-8035.
What is BRENNAN ANDERSON's NPI number?
BRENNAN ANDERSON's National Provider Identifier (NPI) is 1609222355, issued on 05/12/2016.
Does BRENNAN ANDERSON prescribe more brand-name or generic drugs?
BRENNAN ANDERSON's prescribing is 10% brand-name and 90% generic drugs by claim count, with $6K in brand drug costs.
Does BRENNAN ANDERSON prescribe opioids?
Yes, BRENNAN ANDERSON had 16 opioid claims in 2023 with an opioid prescribing rate of 11.0%.
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 BRENNAN ANDERSON prescribe most often?
Based on 2023 Medicare Part D data, BRENNAN ANDERSON's most frequently prescribed drugs include Estradiol, Oxybutynin Chloride Er, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRENNAN ANDERSON accept Medicare?
BRENNAN ANDERSON appears in CMS Medicare data with 145 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 BRENNAN ANDERSON's credentials?
BRENNAN ANDERSON's NPI is 1609222355. 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