NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1336346568 DO
Verify on CMS → Chad Abbey, DO
Obstetrics & Gynecology Physician in Billings, Montana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,313 in Obstetrics & Gynecology 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
63
Medicare Part D claims · 21 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Industry payments
$112.41
6 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Chad Abbey, DO filed 63 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in Billings, Montana.
- 63
- 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.
Chad Abbey, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
63 0th percentile higher than 0% of 1,370,886 prescribers
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)
Chad Abbey, 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 Chad Abbey, DO?
Quality data not reportedPrimary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
63 65% vs specialty avg
Specialty distribution in Montana
How Obstetrics & Gynecology Physician compares to other specialties among Montana providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Obstetrics & Gynecology Physician. Verify directly:
How MIPS and board certification work
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).
Chad Abbey, DO appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding DO credentials at 1611 ZIMMERMAN TRAIL, Billings, MT, 59102, with a listed phone of (406) 248-3607. NPI 1336346568 was issued on 06/29/2007.
Medicare Part D records for calendar year 2023 show 63 prescription claims written by this provider, covering 21 Medicare beneficiaries and totaling roughly $5K in drug spend.
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
Provider Details
| NPI | 1336346568 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 06/29/2007 |
Hospital and facility affiliations
Facilities where Chad Abbey, 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.
Billings OB-Gyn Associates PC
Billings, MT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Chad Abbey, DO. Source: openpaymentsdata.cms.gov.
Total received
$112
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
63
Total Claims
$5K
Total Drug Cost
21
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 99
- Total Day Supply
- 2,287
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 58.0 years
- Avg HCC Risk Score
- 0.91
- Gender Split
- 100% female / 0% male
Obstetrics & Gynecology Physician Overview
How Chad Abbey, DO 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
Chad Abbey, DO's 63 claims are below the specialty average of 179.
Nearby Obstetrics & Gynecology Physician Providers in Montana
Other clinicians with the same primary specialty enrolled in Montana, drawn from the same CMS NPPES roster as Abbey.
Dr. Elise Abicht
MD
Missoula, MT
Dr. Silddy Atilano
M.D.
Bozeman, MT
Dr. Jennifer Austin
D.O.
Anaconda, MT
Dr. Sandra Bailey
D.O.
Great Falls, MT
Dr. Shawn Barrong
M.D.
Kalispell, MT
Compare Obstetrics & Gynecology 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 Montana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Obstetrics & Gynecology 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.
Healthcare Guides
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How to Find a Doctor
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Montana
Frequently Asked Questions
What is Chad Abbey, DO's specialty? ▼
Chad Abbey, DO specializes in Obstetrics & Gynecology Physician and practices in Billings, Montana. Credentials: DO.
How much does Chad Abbey, DO prescribe under Medicare Part D? ▼
In 2023, Chad Abbey, DO wrote 63 Medicare Part D claims totaling $5K in drug costs for 21 beneficiaries.
Where is Chad Abbey, DO located? ▼
Chad Abbey, DO is located at 1611 ZIMMERMAN TRAIL, Billings, MT, 59102. Phone: (406) 248-3607.
What is Chad Abbey, DO's NPI number? ▼
Chad Abbey, DO's National Provider Identifier (NPI) is 1336346568, issued on 06/29/2007.
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.
Does Chad Abbey, DO accept Medicare? ▼
Chad Abbey, DO appears in CMS Medicare data with 63 Part D claims and 21 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chad Abbey, DO's credentials? ▼
Chad Abbey, DO's NPI is 1336346568 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
View source datasets and methodology notes
- 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.