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2026 NPPES data Obstetrics & Gynecology Physician NPI 1245525930 MD
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Nathan Petersen, MD

Obstetrics & Gynecology Physician in Glendale, Arizona.

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
46
Medicare Part D claims · 12 beneficiaries · Obstetrics & Gynecology Physician avg: 179
MIPS score
87.1/100
▲ 4 pts above national avg 83.5 · Above neutral
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Nathan Petersen, MD reported a CMS MIPS final score of 87.1/100 - above the 83.5 national average - and filed 46 Medicare Part D claims in 2023.

87.1/100
MIPS score · +4 vs avg
46
Part D claims, 2023
Likely
board-certified (heuristic)
≥52nd
pct among measured MIPS (lower-bound band)

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.

CMS NPPES provider registry desk

NPI 1245525930 · Obstetrics & Gynecology Physician

NPI-10 · ENUM-MID · TAX-MID · MIPS-ABOVE · RX-TRACE · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1245525930
  • ENUM-MID 2011
  • TAX-MID 44K Obstetrics &
  • MIPS-ABOVE 87.1/100
  • RX-TRACE 46
  • BOOK-LIGHT 796 in Arizona
  • PHOTO-FINISH Sarika Arora · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Nathan Petersen, 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.

87 ≥ 52nd percentile 52% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). This entry sits in this band. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

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 Nathan Petersen, 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, Nathan Petersen, MD writes more Part D claims than 24% of them and scores higher on MIPS quality than 49% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 67Nathan Petersen, MD, Part D claim volume, percentile in specialty: 24 · MIPS quality, percentile: 49
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 Nathan Petersen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Nathan Petersen, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Nathan Petersen, MD?

High performer (top quartile)

NPI registry status

Active

Issued 06/10/2011

NPI 1245525930

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,326 US NPIs in this specialty

Medicare Part D claims

46 74% vs specialty avg

2023 prescription claims

Specialty avg: 179

MIPS final score

87.1/100 3.6 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in Arizona

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

Arizona providers
Pharmacist5.6%Behavior Technician5.6%Family Nurse Practitioner4.3%Physical Therapist4.2%Speech-Language Pathologist3.5%Student in an Organized Heal…3.5%Obstetrics & Gynecology Phys…0.6%
Largest specialties in Arizona (% of in-state providers)

Medicare quality performance, MIPS

Nathan Petersen, MD's 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average

High performer (top quartile)
MIPS Final Score
87.1/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%87.1%
MIPS final score (Obstetrics & Gynecology Physician) - 87.1/100 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).

Practice Address

6370 W UNION HILLS DR
Glendale, AZ 85308
(623) 414-3500

Provider Details

NPI 1245525930
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Male
NPI Issued 06/10/2011

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

87.0887
Final Score
Measured-score avg: 83.5
70.7998
Quality
52.8291
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Nathan Petersen, MD 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.

Heartland Community Health Clinic
Peoria, IL
The Board OF Trustees OF The University OF Illinois
Peoria, IL

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.

46
Total Claims
$884
Total Drug Cost
12
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
75
Total Day Supply
2,091
Generic Drug Cost
$601

Patient Demographics

Average Patient Age
47.6 years
Avg HCC Risk Score
1.68
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.

Drug Claims
Medroxyprogesterone Acetate
 30

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

More Obstetrics & Gynecology Physician in AZ → All providers in Arizona → Compare specialties →

Obstetrics & Gynecology Physician Overview

How Nathan Petersen, 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

Nathan Petersen, MD's 46 claims are below the specialty average of 179.

Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Petersen, both outside Arizona so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (87.1 here).

Sarika Arora 87.1 IL Catalin Buhimschi 87.1 IL Shruti Chakravarthy 87.1 IL Stephanie Chen 87.1 IL

Same NPPES enumeration year (2011)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Gerald Doersam Modesto, CA Guillermo Kohn Hialeah, FL Margaret Tanzy Orlando, FL Erica Hinz Chicago, IL

Nearby Obstetrics & Gynecology Physician Providers in Arizona

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

One of 796 Obstetrics & Gynecology Physician providers enrolled in Arizona, 5 are shown here.

Dr. Michelle Abbate
MD
Tucson, AZ
Dr. Judith Adams
MD
Gilbert, AZ
Dr. Julie Adams
DO
Chandler, AZ
Dr. Karen Adams
MD
Phoenix, AZ
Dr. Andrew Adamson
DO
Mesa, AZ

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

Frequently Asked Questions

What is Nathan Petersen, MD's specialty? ▼
Nathan Petersen, MD specializes in Obstetrics & Gynecology Physician and practices in Glendale, Arizona. Credentials: MD.
How much does Nathan Petersen, MD prescribe under Medicare Part D? ▼
In 2023, Nathan Petersen, MD wrote 46 Medicare Part D claims totaling $884 in drug costs for 12 beneficiaries.
What is Nathan Petersen, MD's Medicare quality score? ▼
Nathan Petersen, MD has a CMS MIPS Final Score of 87.1/100 (Quality: 70.8, Cost: 52.8). 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 Nathan Petersen, MD located? ▼
Nathan Petersen, MD is located at 6370 W UNION HILLS DR, Glendale, AZ, 85308. Phone: (623) 414-3500.
What is Nathan Petersen, MD's NPI number? ▼
Nathan Petersen, MD's National Provider Identifier (NPI) is 1245525930, issued on 06/10/2011.
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 Nathan Petersen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Nathan Petersen, MD's most frequently prescribed drugs include Medroxyprogesterone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nathan Petersen, MD accept Medicare? ▼
Nathan Petersen, MD appears in CMS Medicare data with 46 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nathan Petersen, MD's credentials? ▼
Nathan Petersen, MD's NPI is 1245525930 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

Compiled from official public sources by the editorial process.

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.