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2026 NPPES data Gastroenterology Physician NPI 1710088729 M.D.
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Isaac Bartley, M.D.

Gastroenterology Physician in Glendale, California.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 17,061 in Gastroenterology 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
529
Medicare Part D claims · 200 beneficiaries · Gastroenterology Physician avg: 848
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
19.5/100
▼ 64 pts below national avg 83.5 · Below average
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Isaac Bartley, M.D. reported a CMS MIPS final score of 19.5/100 - below the 83.5 national average - and filed 529 Medicare Part D claims in 2024.

19.5/100
MIPS score · -64 vs avg
529
Part D claims, 2024
81%
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.

Federal trust snapshot

What official records show about Isaac Bartley, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1710088729), first enumerated 09/25/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 529 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 19.5/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not Isaac Bartley, M.D.'s individual license status. Verify directly with the state medical board.

    Source: MBC annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1710088729 · Gastroenterology Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-LOW · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1710088729
  • ENUM-LEGACY 2006
  • TAX-MID 17K Gastroenterology Physician
  • MIPS-LOW 19.5/100
  • RX-LIGHT 529
  • BOOK-LIGHT 1,749 in California
  • PHOTO-FINISH Kester Crosse, M.D. · ±0.1

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

Isaac Bartley, M.D.'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.

20 ≥ 3rd percentile 3% 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%). This entry sits in this band. 20–30: 3,069 measured providers (1%). Above this entry. 30–40: 2,746 measured providers (1%). Above this entry. 40–50: 2,928 measured providers (1%). Above this entry. 50–60: 5,882 measured providers (1%). Above this entry. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 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 Isaac Bartley, M.D. sits

This provider among gastroenterology physician peers

Across the 5,560 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Isaac Bartley, M.D. writes more Part D claims than 36% of them and scores higher on MIPS quality than 3% - 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: 68 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 78Isaac Bartley, M.D., Part D claim volume, percentile in specialty: 36 · MIPS quality, percentile: 3
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one gastroenterology physician peer from a representative sample of 60; the gold marker is Isaac Bartley, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Isaac Bartley, M.D. 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 Isaac Bartley, M.D.?

Below national average

NPI registry status

Active

Issued 09/25/2006

NPI 1710088729

Primary specialty

Gastroenterology Physician

Mid-sized

17,061 US NPIs in this specialty

Medicare Part D claims

529 38% vs specialty avg

2024 prescription claims

Specialty avg: 848

MIPS final score

19.5/100 64 pts vs avg

Below average band

vs 83.5 national avg

Specialty distribution in California

How Gastroenterology Physician compares to other specialties among California providers

California providers
Behavior Technician17.9%Marriage & Family Therapist5.4%Student in an Organized Heal…5.1%Mental Health Counselor3.7%Pharmacist3.4%Clinical Social Worker3.1%Gastroenterology Physician0.2%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Isaac Bartley, M.D.'s 2023 MIPS final score plotted against the Gastroenterology Physician national average

Below national average
MIPS Final Score
19.5/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%19.5%
MIPS final score (Gastroenterology Physician) - 19.5/100 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).

Practice Address

1560 E CHEVY CHASE DR STE 225
Glendale, CA 91206
(818) 956-7507

Provider Details

NPI 1710088729
Specialty Gastroenterology Physician
Credentials M.D.
Gender Male
NPI Issued 09/25/2006

CMS Quality Score (MIPS)

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

19.4945
Final Score
Measured-score avg: 83.5
0
Quality
64.9816
Cost

Reporting: Individual

License & disciplinary context - California MBC 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Isaac Bartley, M.D.. To verify Isaac Bartley, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

Isaac Bartley, M.D. - brand share 19.0%
Gastroenterology Physician average

19% brand-name claims vs 81% generic, on 529 2024 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 2024.

529
Total Claims
$351K
Total Drug Cost
200
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
921.567
Total Day Supply
23,376
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$316K
Generic Drug Cost
$35K
Antibiotic Claims
11

Patient Demographics

Average Patient Age
73.2 years
Avg HCC Risk Score
1.56
Gender Split
59% female / 42% male
Age Distribution
<65: 18, 65-74: 101, 75-84: 63, 85+: 18

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Isaac Bartley, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Sod Sulf-Potass Sulf-Mag Sulf
Sodium, Potassium,mag Sulfates
104
Omeprazole
 100
Pantoprazole Sodium
 82
Creon
Lipase/Protease/Amylase
27
Mesalamine
 21
Lansoprazole
 15
Mesalamine Dr
Mesalamine
15
Mercaptopurine
 13
Colestipol Hcl
 12
Sulfasalazine
 12

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

More Gastroenterology Physician in CA → All providers in California → Compare specialties →

Gastroenterology Physician Overview

How Isaac Bartley, M.D. fits within the Gastroenterology Physician landscape nationally.

17,061
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
848
Avg Claims per Provider

Isaac Bartley, M.D.'s 529 claims are below the specialty average of 848.

Nationwide Gastroenterology Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (19.5 here).

Kester Crosse 19.4 MD Robert Ganz 19.3 MN Julian Jakobovits 19.7 MD Francesco Ferretti 20 FL

Same NPPES enumeration year (2006)

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

Lance Lasner Centreville, VA Francisco Aguilo-Seara Rockledge, FL Michael Eng New York, NY Erik Pieramici Lone Tree, CO

Nearby Gastroenterology Physician Providers in California

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

One of 1,749 Gastroenterology Physician providers enrolled in California, 5 are shown here.

Dr. David Aarons
MD
Lodi, CA
Dr. Constante Abaya
MD
Oxnard, CA
Dr. Homan Abdollahzadeh
MD
Palm Springs, CA
Dr. John Abdulian
M.D.
Fresno, CA
Dr. Hussein Abidali
DO
Rancho Cucamonga, CA

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

Frequently Asked Questions

What is Isaac Bartley, M.D.'s specialty? ▼
Isaac Bartley, M.D. specializes in Gastroenterology Physician and practices in Glendale, California. Credentials: M.D..
How much does Isaac Bartley, M.D. prescribe under Medicare Part D? ▼
In 2024, Isaac Bartley, M.D. wrote 529 Medicare Part D claims totaling $351K in drug costs for 200 beneficiaries.
What is Isaac Bartley, M.D.'s Medicare quality score? ▼
Isaac Bartley, M.D. has a CMS MIPS Final Score of 19.5/100 (Quality: 0, Cost: 65). 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 Isaac Bartley, M.D. located? ▼
Isaac Bartley, M.D. is located at 1560 E CHEVY CHASE DR STE 225, Glendale, CA, 91206. Phone: (818) 956-7507.
What is Isaac Bartley, M.D.'s NPI number? ▼
Isaac Bartley, M.D.'s National Provider Identifier (NPI) is 1710088729, issued on 09/25/2006.
Does Isaac Bartley, M.D. prescribe more brand-name or generic drugs? ▼
Isaac Bartley, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $316K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 17,061 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 848 Medicare Part D claims per year.
What drugs does Isaac Bartley, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Isaac Bartley, M.D.'s most frequently prescribed drugs include Sod Sulf-Potass Sulf-Mag Sulf, Omeprazole, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Isaac Bartley, M.D. accept Medicare? ▼
Isaac Bartley, M.D. appears in CMS Medicare data with 529 Part D claims and 200 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Isaac Bartley, M.D.'s credentials? ▼
Isaac Bartley, M.D.'s NPI is 1710088729 with credentials M.D.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.