2026 NPPES data Obesity Medicine (Internal Medicine) Physician NPI 1942258124 MD
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HARPREET SINGH, MD

Obesity Medicine (Internal Medicine) Physician in OXNARD, 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
559
Medicare Part D claims · 199 beneficiaries · Obesity Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$144.69
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

HARPREET SINGH, MD filed 559 Medicare Part D claims in 2023 as a Obesity Medicine (Internal Medicine) Physician in OXNARD, California, prescribing 83% generic.

559
Part D claims, 2023
83%
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.

HARPREET SINGH, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

559 Top 34% higher than 66% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

HARPREET SINGH, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — 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 HARPREET SINGH, MD?

Quality data not reported

NPI registry status

Active

Issued 05/04/2006

NPI 1942258124

Primary specialty

Obesity Medicine (Internal Medicine) Physician

Rare

142 US NPIs in this specialty

Medicare Part D claims

559 47% vs specialty avg

2023 prescription claims

Specialty avg: 1,046

Specialty distribution in California

How Obesity Medicine (Internal Medicine) Physician compares to other specialties among California providers

California providers

Obesity Medicine (Internal Medicine) Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Obesity Medicine (Internal Medicine) Physician (ABMS / AOA reference)

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

Est. board-certified rate (Obesity Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obesity Medicine (Internal Medicine) 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).

HARPREET SINGH, MD appears in the CMS NPPES registry as a Obesity Medicine (Internal Medicine) Physician provider holding MD credentials at 921 W 7TH ST, OXNARD, CA, 93030, with a listed phone of (805) 486-1601. NPI 1942258124 was issued on 05/04/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SINGH 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 559 prescription claims written by this provider, covering 199 Medicare beneficiaries and totaling roughly $110K in drug spend, split 17% brand-name and 83% generic by claim count. 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.

Obesity Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 142 enrolled providers across 36 states and an average of 1,046 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

921 W 7TH ST
OXNARD, CA 93030

Provider Details

NPI 1942258124
Specialty Obesity Medicine (Internal Medicine) Physician
Credentials MD
Gender Female
NPI Issued 05/04/2006

Hospital and facility affiliations

Facilities where HARPREET SINGH, 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.

KARANDEEP SINGH MD PC
OXNARD, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 HARPREET SINGH, MD. Source: openpaymentsdata.cms.gov.

Total received

$145

Largest payer

AstraZeneca Pharmaceuticals LP

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.

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 HARPREET SINGH, MD. To verify HARPREET SINGH, 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.

Brand vs generic prescribing mix · Typical

HARPREET SINGH, MD — brand share 17.0%
Specialty average (est.)

17% brand-name claims vs 83% generic, on 559 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.

559
Total Claims
$110K
Total Drug Cost
199
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,195
Total Day Supply
34,756
Brand vs Generic
17% brand / 83% generic
Brand Drug Cost
$96K
Generic Drug Cost
$13K
Antibiotic Claims
11

Patient Demographics

Average Patient Age
76.3 years
Avg HCC Risk Score
1.66
Gender Split
59% female / 41% male
Age Distribution
<65: 18, 65-74: 72, 75-84: 65, 85+: 44

Top Prescribed Drugs (Medicare Part D)

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

What HARPREET SINGH, 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
Lisinopril
29
Amlodipine Besylate
27
Atorvastatin Calcium
26
Levothyroxine Sodium
21
Metoprolol Succinate
18
Clopidogrel
Clopidogrel Bisulfate
17
Omeprazole
15
Pregabalin
15
Furosemide
14
Metoprolol Tartrate
14

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

Obesity Medicine (Internal Medicine) Physician Overview

How HARPREET SINGH, MD fits within the Obesity Medicine (Internal Medicine) Physician landscape nationally.

142
Obesity Medicine (Internal Medicine) Physician Providers in US
36
States with Obesity Medicine (Internal Medicine) Physician
1,046
Avg Claims per Provider

HARPREET SINGH, MD's 559 claims are below the specialty average of 1,046.

Nearby Obesity Medicine (Internal Medicine) Physician Providers in California

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

Compare Obesity Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is HARPREET SINGH, MD's specialty?
HARPREET SINGH, MD specializes in Obesity Medicine (Internal Medicine) Physician and practices in OXNARD, California. Credentials: MD.
How much does HARPREET SINGH, MD prescribe under Medicare Part D?
In 2023, HARPREET SINGH, MD wrote 559 Medicare Part D claims totaling $110K in drug costs for 199 beneficiaries.
Where is HARPREET SINGH, MD located?
HARPREET SINGH, MD is located at 921 W 7TH ST, OXNARD, CA, 93030. Phone: (805) 486-1601.
What is HARPREET SINGH, MD's NPI number?
HARPREET SINGH, MD's National Provider Identifier (NPI) is 1942258124, issued on 05/04/2006.
Does HARPREET SINGH, MD prescribe more brand-name or generic drugs?
HARPREET SINGH, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $96K in brand drug costs.
How many Obesity Medicine (Internal Medicine) Physician providers are there in the US?
There are 142 Obesity Medicine (Internal Medicine) Physician providers across 36 states in the US. The average Obesity Medicine (Internal Medicine) Physician provider writes 1,046 Medicare Part D claims per year.
What drugs does HARPREET SINGH, MD prescribe most often?
Based on 2023 Medicare Part D data, HARPREET SINGH, MD's most frequently prescribed drugs include Lisinopril, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HARPREET SINGH, MD accept Medicare?
HARPREET SINGH, MD appears in CMS Medicare data with 559 Part D claims and 199 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HARPREET SINGH, MD's credentials?
HARPREET SINGH, MD's NPI is 1942258124 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