NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1316934698 MD
Verify on CMS → Susan Chapman, MD
Obstetrics & Gynecology Physician in Kailua, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,326 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
517
Medicare Part D claims · 180 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
72.5/100
▼ 11 pts below national avg 83.5 · Mid-tier
Industry payments
$144.14
7 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Susan Chapman, MD reported a CMS MIPS final score of 72.5/100 - below the 83.5 national average - and filed 517 Medicare Part D claims in 2023.
- 72.5/100
- MIPS score · -11 vs avg
- 517
- Part D claims, 2023
- 79%
- 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.
Susan Chapman, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
73 ≥ 10th percentile 10% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Susan Chapman, MD sits
This provider among obstetrics & gynecology physician peers
Across the 7,360 obstetrics & gynecology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Susan Chapman, MD writes more Part D claims than 93% of them and scores higher on MIPS quality than 7% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one obstetrics & gynecology physician peer from a representative sample of 60; the gold marker is Susan Chapman, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Susan Chapman, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Susan Chapman, MD?
Below national averagePrimary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
517 189% vs specialty avg
MIPS final score
72.5/100 11 pts vs avg
Specialty distribution in Hawaii
How Obstetrics & Gynecology Physician compares to other specialties among Hawaii providers
Medicare quality performance, MIPS
Susan Chapman, MD's 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average
- MIPS Final Score
- 72.5/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Obstetrics & Gynecology Physician) - 72.5/100 vs national avg 83.5
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).
Susan Chapman, MD appears in the CMS NPPES registry as an Obstetrics & Gynecology Physician provider holding MD credentials at 642 ULUKAHIKI ST, Kailua, HI, 96734, with a listed phone of (808) 261-6644. NPI 1316934698 was issued on 10/03/2005.
Medicare Part D records for calendar year 2023 show 517 prescription claims written by this provider, covering 180 Medicare beneficiaries and totaling roughly $120K in drug spend, split 21% brand-name and 79% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 72.5/100 for the 2023 performance year (Quality 65.6, Cost 51.9), compared with the 83.5 average among clinicians with a measured score.
Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,326 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 | 1316934698 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 10/03/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
72.5169
Final Score
Measured-score avg: 83.5
65.641
Quality
51.9154
Cost
89
Promoting Interoperability
Reporting: Group practice
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 Susan Chapman, MD. Source: openpaymentsdata.cms.gov.
Total received
$144
Largest payer
Ethicon US, LLC
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.
Brand vs generic prescribing mix · Typical
Susan Chapman, MD - brand share 21.0%
Obstetrics & Gynecology Physician average
21% brand-name claims vs 79% generic, on 517 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.
517
Total Claims
$120K
Total Drug Cost
180
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,285
- Total Day Supply
- 37,074
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $93K
- Generic Drug Cost
- $27K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 0.80
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Susan Chapman, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Estradiol
Estradiol
104 claims
- Alendronate Sodium
Alendronate Sodium
76 claims
- Triamcinolone Acet… 36
Triamcinolone Acetonide
36 claims
- Prolia 35
Prolia
35 claims
- Yuvafem 33
Yuvafem
33 claims
- Valacyclovir 20
Valacyclovir
20 claims
- Estradiol (Twice W… 19
Estradiol (Twice Weekly)
19 claims
- Raloxifene Hcl 16
Raloxifene Hcl
16 claims
| Drug | Claims |
|---|---|
| Estradiol | 104 |
| Alendronate Sodium | 76 |
| Triamcinolone Acetonide | 36 |
| Prolia Denosumab | 35 |
| Yuvafem Estradiol | 33 |
| Valacyclovir Valacyclovir Hcl | 20 |
| Estradiol (Twice Weekly) Estradiol | 19 |
| Raloxifene Hcl | 16 |
| Premarin "Estrogens | N/A |
| Prempro "Estrogen | N/A |
* 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 Susan Chapman, MD fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Susan Chapman, MD's 517 claims are above the specialty average of 179.
Nearby Obstetrics & Gynecology Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Chapman.
Dr. Michael Aaronoff
MD
Waipahu, HI
Dr. Celeste Adrian
M.D.
Wailuku, HI
Dr. Tod Aeby
MD
Honolulu, HI
Dr. Aaron Altura
M.D.
Wailuku, HI
Dr. Elenita Alvarez
MD
Honolulu, HI
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 Hawaii 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.
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Frequently Asked Questions
What is Susan Chapman, MD's specialty? ▼
Susan Chapman, MD specializes in Obstetrics & Gynecology Physician and practices in Kailua, Hawaii. Credentials: MD.
How much does Susan Chapman, MD prescribe under Medicare Part D? ▼
In 2023, Susan Chapman, MD wrote 517 Medicare Part D claims totaling $120K in drug costs for 180 beneficiaries.
What is Susan Chapman, MD's Medicare quality score? ▼
Susan Chapman, MD has a CMS MIPS Final Score of 72.5/100 (Quality: 65.6, Cost: 51.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Susan Chapman, MD located? ▼
Susan Chapman, MD is located at 642 ULUKAHIKI ST, Kailua, HI, 96734. Phone: (808) 261-6644.
What is Susan Chapman, MD's NPI number? ▼
Susan Chapman, MD's National Provider Identifier (NPI) is 1316934698, issued on 10/03/2005.
Does Susan Chapman, MD prescribe more brand-name or generic drugs? ▼
Susan Chapman, MD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $93K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 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 Susan Chapman, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Susan Chapman, MD's most frequently prescribed drugs include Estradiol, Alendronate Sodium, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Susan Chapman, MD accept Medicare? ▼
Susan Chapman, MD appears in CMS Medicare data with 517 Part D claims and 180 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Susan Chapman, MD's credentials? ▼
Susan Chapman, MD's NPI is 1316934698 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
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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.