2026 NPPES data Emergency Medicine Physician NPI 1619934643 MD
Verify on CMS →

ISAAC BASH, MD

Emergency Medicine Physician in SANTA MONICA, California. 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
585
Medicare Part D claims · 293 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
90.0098/100
▲ 7 pts above national avg 83.1 · [object Object]

What the federal data shows

ISAAC BASH, MD reported a CMS MIPS final score of 90.0098/100 — above the 83.1 national average — and filed 585 Medicare Part D claims in 2023.

90.0098/100
MIPS score · +7 vs avg
585
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.

ISAAC BASH, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

90 Top 40% higher than 60% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

ISAAC BASH, 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 ISAAC BASH, MD?

High performer (top quartile)

NPI registry status

Active

Issued 04/26/2006

NPI 1619934643

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

585 66% vs specialty avg

2023 prescription claims

Specialty avg: 352

MIPS final score

90.0098/100 6.909800000000004% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in California

How Emergency Medicine Physician compares to other specialties among California providers

California providers

Emergency Medicine Physician share within California

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within California

Medicare quality performance — MIPS

ISAAC BASH, MD's 2023 MIPS final score plotted against the Emergency Medicine Physician national average

High performer (top quartile)
MIPS Final Score
90.0098/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Emergency Medicine Physician) — 90.0098/100 vs national avg 83.1

0%100%National avg83%90%
MIPS final score (Emergency Medicine Physician) — 90.0098/100 vs national avg 83.1

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).

ISAAC BASH, MD appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding MD credentials at 2121 SANTA MONICA BLVD, SANTA MONICA, CA, 90404, with a listed phone of (310) 582-7089. NPI 1619934643 was issued on 04/26/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BASH 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 585 prescription claims written by this provider, covering 293 Medicare beneficiaries and totaling roughly $9K in drug spend, with an opioid prescribing rate of 17.1%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 90.0098/100 for the 2023 performance year (Quality 76.8155), compared with the national average of 83.1.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

2121 SANTA MONICA BLVD
SANTA MONICA, CA 90404

Provider Details

NPI 1619934643
Specialty Emergency Medicine Physician
Credentials MD
Gender Male
NPI Issued 04/26/2006

CMS Quality Score (MIPS)

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

90.0098
Final Score
Avg: 83.1
76.8155
Quality

Reporting: Group practice

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 BASH, MD. To verify ISAAC BASH, MD'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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

585
Total Claims
$9K
Total Drug Cost
293
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
585
Total Day Supply
4,413
Generic Drug Cost
$5K
Opioid Claims
100 (17.1% rate)
Antibiotic Claims
124

Patient Demographics

Average Patient Age
73.8 years
Avg HCC Risk Score
1.67
Gender Split
60% female / 40% male
Age Distribution
<65: 32, 65-74: 122, 75-84: 93, 85+: 46

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What ISAAC BASH, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Ondansetron Odt
Ondansetron
62
Ibuprofen
58
Cephalexin
39
Tramadol Hcl
38
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
31
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
30
Azithromycin
24
Prednisone
24
Ondansetron Hcl
16
Cyclobenzaprine Hcl
15

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

Emergency Medicine Physician Overview

How ISAAC BASH, MD fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

ISAAC BASH, MD's 585 claims are above the specialty average of 352.

Nearby Emergency Medicine Physician Providers in California

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ISAAC BASH, MD's specialty?
ISAAC BASH, MD specializes in Emergency Medicine Physician and practices in SANTA MONICA, California. Credentials: MD.
How much does ISAAC BASH, MD prescribe under Medicare Part D?
In 2023, ISAAC BASH, MD wrote 585 Medicare Part D claims totaling $9K in drug costs for 293 beneficiaries.
What is ISAAC BASH, MD's Medicare quality score?
ISAAC BASH, MD has a CMS MIPS Final Score of 90.0098/100 (Quality: 76.8155). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ISAAC BASH, MD located?
ISAAC BASH, MD is located at 2121 SANTA MONICA BLVD, SANTA MONICA, CA, 90404. Phone: (310) 582-7089.
What is ISAAC BASH, MD's NPI number?
ISAAC BASH, MD's National Provider Identifier (NPI) is 1619934643, issued on 04/26/2006.
Does ISAAC BASH, MD prescribe opioids?
Yes, ISAAC BASH, MD had 100 opioid claims in 2023 with an opioid prescribing rate of 17.1%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does ISAAC BASH, MD prescribe most often?
Based on 2023 Medicare Part D data, ISAAC BASH, MD's most frequently prescribed drugs include Ondansetron Odt, Ibuprofen, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ISAAC BASH, MD accept Medicare?
ISAAC BASH, MD appears in CMS Medicare data with 585 Part D claims and 293 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ISAAC BASH, MD's credentials?
ISAAC BASH, MD's NPI is 1619934643 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

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