2026 NPPES data Diagnostic Radiology Physician NPI 1568614899 D.O.
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JOHN CLARK, D.O.

Diagnostic Radiology Physician in TEMPLE, Texas. 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
140
Medicare Part D claims · Diagnostic Radiology Physician avg: 63
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JOHN CLARK, D.O. filed 140 Medicare Part D claims in 2023 as a Diagnostic Radiology Physician in TEMPLE, Texas, prescribing 80% generic.

140
Part D claims, 2023
80%
generic prescribing

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.

JOHN CLARK, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

140 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 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-eligible specialty (heuristic — not verified)

JOHN CLARK, D.O. 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).

What does the federal data show about JOHN CLARK, D.O.?

Quality data not reported

NPI registry status

Active

Issued 10/17/2008

NPI 1568614899

Primary specialty

Diagnostic Radiology Physician

Mid-sized

39,474 US NPIs in this specialty

Medicare Part D claims

140 122% vs specialty avg

2023 prescription claims

Specialty avg: 63

Specialty distribution in Texas

How Diagnostic Radiology Physician compares to other specialties among Texas providers

Texas providers

Diagnostic Radiology Physician share within Texas

1. Diagnostic Radiology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Diagnostic Radiology Physician share within Texas

Specialty board-certification context

Estimated specialty board-certified rate — Diagnostic Radiology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Diagnostic Radiology Physician ABMS/AOA estimate

Est. board-certified rate (Diagnostic Radiology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Diagnostic Radiology 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).

JOHN CLARK, D.O. appears in the CMS NPPES registry as a Diagnostic Radiology Physician provider holding D.O. credentials at 1901 VETERANS MEMORIAL DR, TEMPLE, TX, 76504, with a listed phone of (254) 778-4811. NPI 1568614899 was issued on 10/17/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 140 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $3K in drug spend, split 20% brand-name and 80% 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.

Diagnostic Radiology Physician is a mid-sized specialty nationwide, with 39,474 enrolled providers across 56 states and an average of 63 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

1901 VETERANS MEMORIAL DR
TEMPLE, TX 76504

Provider Details

NPI 1568614899
Specialty Diagnostic Radiology Physician
Credentials D.O.
Gender Male
NPI Issued 10/17/2008

License & disciplinary context — Texas TMB 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 ~77K Texas medical licensees in 2023 — they are NOT specific to JOHN CLARK, D.O.. To verify JOHN CLARK, D.O.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases

TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

JOHN CLARK, D.O. — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 140 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.

140
Total Claims
$3K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
140
Total Day Supply
3,439
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$775
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
78.4 years
Avg HCC Risk Score
1.52

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Levothyroxine Sodium
25
Atorvastatin Calcium
12

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

Diagnostic Radiology Physician Overview

How JOHN CLARK, D.O. fits within the Diagnostic Radiology Physician landscape nationally.

39,474
Diagnostic Radiology Physician Providers in US
56
States with Diagnostic Radiology Physician
63
Avg Claims per Provider

JOHN CLARK, D.O.'s 140 claims are above the specialty average of 63.

Nearby Diagnostic Radiology Physician Providers in Texas

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

Compare Diagnostic Radiology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOHN CLARK, D.O.'s specialty?
JOHN CLARK, D.O. specializes in Diagnostic Radiology Physician and practices in TEMPLE, Texas. Credentials: D.O..
How much does JOHN CLARK, D.O. prescribe under Medicare Part D?
In 2023, JOHN CLARK, D.O. wrote 140 Medicare Part D claims totaling $3K in drug costs for N/A beneficiaries.
Where is JOHN CLARK, D.O. located?
JOHN CLARK, D.O. is located at 1901 VETERANS MEMORIAL DR, TEMPLE, TX, 76504. Phone: (254) 778-4811.
What is JOHN CLARK, D.O.'s NPI number?
JOHN CLARK, D.O.'s National Provider Identifier (NPI) is 1568614899, issued on 10/17/2008.
Does JOHN CLARK, D.O. prescribe more brand-name or generic drugs?
JOHN CLARK, D.O.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $775 in brand drug costs.
How many Diagnostic Radiology Physician providers are there in the US?
There are 39,474 Diagnostic Radiology Physician providers across 56 states in the US. The average Diagnostic Radiology Physician provider writes 63 Medicare Part D claims per year.
What drugs does JOHN CLARK, D.O. prescribe most often?
Based on 2023 Medicare Part D data, JOHN CLARK, D.O.'s most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOHN CLARK, D.O. accept Medicare?
JOHN CLARK, D.O. appears in CMS Medicare data with 140 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOHN CLARK, D.O.'s credentials?
JOHN CLARK, D.O.'s NPI is 1568614899 with credentials D.O.. 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