2026 NPPES data Pain Medicine (Anesthesiology) Physician NPI 1427125434 MD
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ANNIE DIEGO, MD

Pain Medicine (Anesthesiology) Physician in HARBOR CITY, 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
202
Medicare Part D claims · 65 beneficiaries · Pain Medicine (Anesthesiology) Physician avg: 2K
What the federal data reveals: ANNIE DIEGO, MD is a Pain Medicine (Anesthesiology) Physician ([object Object]) practicing in HARBOR CITY, California with a Medicare Part D prescribing footprint of 202 claims across 65 beneficiaries .

What stands out: ANNIE DIEGO, MD filed 202 Medicare Part D claims in 2023 across HARBOR CITY, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ANNIE DIEGO, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

ANNIE DIEGO, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 11/29/2006

NPI 1427125434

Primary specialty

Pain Medicine (Anesthesiology) Physician

Niche

4,020 US NPIs in this specialty

Medicare Part D claims

202 88% vs specialty avg

2023 prescription claims

Specialty avg: 1,657

Specialty distribution in California

How Pain Medicine (Anesthesiology) Physician compares to other specialties among California providers

California providers

Pain Medicine (Anesthesiology) Physician share within California

1. Pain Medicine (Anesthesiology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pain Medicine (Anesthesiology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Pain Medicine (Anesthesiology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pain Medicine (Anesthesiology) Physician ABMS/AOA estimate

Est. board-certified rate (Pain Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pain Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

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).

ANNIE DIEGO, MD is a Pain Medicine (Anesthesiology) Physician provider practicing in HARBOR CITY, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1427125434. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ANNIE DIEGO, MD appears in the CMS NPPES registry as a Pain Medicine (Anesthesiology) Physician provider holding MD credentials at 25825 VERMONT AVE, HARBOR CITY, CA, 90710, with a listed phone of (310) 325-5111. NPI 1427125434 was issued on 11/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DIEGO 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 202 prescription claims written by this provider, covering 65 Medicare beneficiaries and totaling roughly $3K in drug spend. 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.

Pain Medicine (Anesthesiology) Physician is a narrow specialty nationwide, with 4,020 enrolled providers across 53 states and an average of 1,657 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

25825 VERMONT AVE
HARBOR CITY, CA 90710

Provider Details

NPI 1427125434
Specialty Pain Medicine (Anesthesiology) Physician
Credentials MD
Gender Female
NPI Issued 11/29/2006

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 ANNIE DIEGO, MD. To verify ANNIE DIEGO, 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.

202
Total Claims
$3K
Total Drug Cost
65
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
240
Total Day Supply
6,309
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
74.6 years
Avg HCC Risk Score
1.40
Gender Split
75% female / 25% 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
Gabapentin
145
Lidocaine
13

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

Pain Medicine (Anesthesiology) Physician Overview

How ANNIE DIEGO, MD fits within the Pain Medicine (Anesthesiology) Physician landscape nationally.

4,020
Pain Medicine (Anesthesiology) Physician Providers in US
53
States with Pain Medicine (Anesthesiology) Physician
1,657
Avg Claims per Provider

ANNIE DIEGO, MD's 202 claims are below the specialty average of 1,657.

Nearby Pain Medicine (Anesthesiology) Physician Providers in California

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

Compare Pain Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ANNIE DIEGO, MD's specialty?
ANNIE DIEGO, MD specializes in Pain Medicine (Anesthesiology) Physician and practices in HARBOR CITY, California. Credentials: MD.
How much does ANNIE DIEGO, MD prescribe under Medicare Part D?
In 2023, ANNIE DIEGO, MD wrote 202 Medicare Part D claims totaling $3K in drug costs for 65 beneficiaries.
Where is ANNIE DIEGO, MD located?
ANNIE DIEGO, MD is located at 25825 VERMONT AVE, HARBOR CITY, CA, 90710. Phone: (310) 325-5111.
What is ANNIE DIEGO, MD's NPI number?
ANNIE DIEGO, MD's National Provider Identifier (NPI) is 1427125434, issued on 11/29/2006.
How many Pain Medicine (Anesthesiology) Physician providers are there in the US?
There are 4,020 Pain Medicine (Anesthesiology) Physician providers across 53 states in the US. The average Pain Medicine (Anesthesiology) Physician provider writes 1,657 Medicare Part D claims per year.
What drugs does ANNIE DIEGO, MD prescribe most often?
Based on 2023 Medicare Part D data, ANNIE DIEGO, MD's most frequently prescribed drugs include Gabapentin, Lidocaine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANNIE DIEGO, MD accept Medicare?
ANNIE DIEGO, MD appears in CMS Medicare data with 202 Part D claims and 65 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANNIE DIEGO, MD's credentials?
ANNIE DIEGO, MD's NPI is 1427125434 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.
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