2026 NPPES data Adult Medicine Physician NPI 1124066436 M.D.
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THOMAS CONKLIN, M.D.

Adult Medicine Physician in NORTHRIDGE, 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
4K
Medicare Part D claims · 185 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
7.1853/100
▼ 76 pts below national avg 83.1 · [object Object]
Industry payments
$60.62
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

THOMAS CONKLIN, M.D. reported a CMS MIPS final score of 7.1853/100 — below the 83.1 national average — and filed 3,696 Medicare Part D claims in 2023.

7.1853/100
MIPS score · -76 vs avg
4K
Part D claims, 2023
88%
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.

THOMAS CONKLIN, M.D.'s MIPS score vs every scored U.S. clinician

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

7 2nd percentile higher than 2% of 477,587 scored providers

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

THOMAS CONKLIN, 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 THOMAS CONKLIN, M.D.?

Below national average

NPI registry status

Active

Issued 06/02/2006

NPI 1124066436

Primary specialty

Adult Medicine Physician

Niche

2,481 US NPIs in this specialty

Medicare Part D claims

3,696 32% vs specialty avg

2023 prescription claims

Specialty avg: 2,807

MIPS final score

7.1853/100 75.9147% pts

Penalty band band

vs 83.1 national avg

Specialty distribution in California

How Adult Medicine Physician compares to other specialties among California providers

California providers

Adult Medicine Physician share within California

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

Medicare quality performance — MIPS

THOMAS CONKLIN, M.D.'s 2023 MIPS final score plotted against the Adult Medicine Physician national average

Below national average
MIPS Final Score
7.1853/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Adult Medicine Physician) — 7.1853/100 vs national avg 83.1

0%100%National avg83%7.2%
MIPS final score (Adult Medicine Physician) — 7.1853/100 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).

THOMAS CONKLIN, M.D. is a Adult Medicine Physician provider practicing in NORTHRIDGE, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1124066436. 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.

THOMAS CONKLIN, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 18417 NORDHOFF ST, NORTHRIDGE, CA, 91325, with a listed phone of (818) 701-0551. NPI 1124066436 was issued on 06/02/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CONKLIN 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 3,696 prescription claims written by this provider, covering 185 Medicare beneficiaries and totaling roughly $376K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 3.4%. 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 7.1853/100 for the 2023 performance year (Quality 0, Cost 23.951), compared with the national average of 83.1.

Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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

18417 NORDHOFF ST
NORTHRIDGE, CA 91325

Provider Details

NPI 1124066436
Specialty Adult Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/02/2006

CMS Quality Score (MIPS)

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

7.1853
Final Score
Avg: 83.1
0
Quality
23.951
Cost

Reporting: Individual

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 THOMAS CONKLIN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$61

Largest payer

Boehringer Ingelheim Pharmaceuticals, Inc.

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 THOMAS CONKLIN, M.D.. To verify THOMAS CONKLIN, 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

THOMAS CONKLIN, M.D. — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 3,696 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.

3,696
Total Claims
$376K
Total Drug Cost
185
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,385
Total Day Supply
178,218
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$270K
Generic Drug Cost
$103K
Opioid Claims
124 (3.4% rate)
Antibiotic Claims
173

Patient Demographics

Average Patient Age
77.3 years
Avg HCC Risk Score
1.72
Gender Split
60% female / 40% male
Age Distribution
<65: 11, 65-74: 71, 75-84: 51, 85+: 52

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
272
Fluticasone Propionate
146
Levothyroxine Sodium
125
Losartan Potassium
100
Amlodipine Besylate
85
Metformin Hcl
76
Eliquis
Apixaban
74
Azithromycin
72
Omeprazole
65
Mirtazapine
62

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

Adult Medicine Physician Overview

How THOMAS CONKLIN, M.D. fits within the Adult Medicine Physician landscape nationally.

2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider

THOMAS CONKLIN, M.D.'s 3,696 claims are above the specialty average of 2,807.

Nearby Adult Medicine Physician Providers in California

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

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

Frequently Asked Questions

What is THOMAS CONKLIN, M.D.'s specialty?
THOMAS CONKLIN, M.D. specializes in Adult Medicine Physician and practices in NORTHRIDGE, California. Credentials: M.D..
How much does THOMAS CONKLIN, M.D. prescribe under Medicare Part D?
In 2023, THOMAS CONKLIN, M.D. wrote 3,696 Medicare Part D claims totaling $376K in drug costs for 185 beneficiaries.
What is THOMAS CONKLIN, M.D.'s Medicare quality score?
THOMAS CONKLIN, M.D. has a CMS MIPS Final Score of 7.1853/100 (Quality: 0, Cost: 23.951). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is THOMAS CONKLIN, M.D. located?
THOMAS CONKLIN, M.D. is located at 18417 NORDHOFF ST, NORTHRIDGE, CA, 91325. Phone: (818) 701-0551.
What is THOMAS CONKLIN, M.D.'s NPI number?
THOMAS CONKLIN, M.D.'s National Provider Identifier (NPI) is 1124066436, issued on 06/02/2006.
Does THOMAS CONKLIN, M.D. prescribe more brand-name or generic drugs?
THOMAS CONKLIN, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $270K in brand drug costs.
Does THOMAS CONKLIN, M.D. prescribe opioids?
Yes, THOMAS CONKLIN, M.D. had 124 opioid claims in 2023 with an opioid prescribing rate of 3.4%.
How many Adult Medicine Physician providers are there in the US?
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does THOMAS CONKLIN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS CONKLIN, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Fluticasone Propionate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS CONKLIN, M.D. accept Medicare?
THOMAS CONKLIN, M.D. appears in CMS Medicare data with 3,696 Part D claims and 185 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS CONKLIN, M.D.'s credentials?
THOMAS CONKLIN, M.D.'s NPI is 1124066436 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

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