2026 NPPES data General Practice Physician NPI 1588727606 MD
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THOMAS MILLIKAN, MD

General Practice Physician in NEW CASTLE, Indiana. 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
2K
Medicare Part D claims · 99 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: THOMAS MILLIKAN, MD is a General Practice Physician ([object Object]) practicing in NEW CASTLE, Indiana with a Medicare Part D prescribing footprint of 2K claims across 99 beneficiaries — 8% brand-name prescribing .

What stands out: THOMAS MILLIKAN, MD filed 2,475 Medicare Part D claims in 2023 across NEW CASTLE, Indiana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

THOMAS MILLIKAN, 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).

THOMAS MILLIKAN, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 12/19/2006

NPI 1588727606

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

2,475 14% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in Indiana

How General Practice Physician compares to other specialties among Indiana providers

Indiana providers

General Practice Physician share within Indiana

1. General Practice Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Physician share within Indiana

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

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

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice 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).

THOMAS MILLIKAN, MD is a General Practice Physician provider practicing in NEW CASTLE, Indiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1588727606. 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 MILLIKAN, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at 700 S 14TH ST, NEW CASTLE, IN, 47362, with a listed phone of (765) 521-0832. NPI 1588727606 was issued on 12/19/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MILLIKAN 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 2,475 prescription claims written by this provider, covering 99 Medicare beneficiaries and totaling roughly $207K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 7.3%. 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

700 S 14TH ST
NEW CASTLE, IN 47362

Provider Details

NPI 1588727606
Specialty General Practice Physician
Credentials MD
Gender Male
NPI Issued 12/19/2006

Brand vs generic prescribing mix · Generic-heavy

THOMAS MILLIKAN, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 2,475 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.

2,475
Total Claims
$207K
Total Drug Cost
99
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,348
Total Day Supply
125,104
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$149K
Generic Drug Cost
$56K
Opioid Claims
180 (7.3% rate)
Antibiotic Claims
108

Patient Demographics

Average Patient Age
70.1 years
Avg HCC Risk Score
0.95
Gender Split
44% female / 56% 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
Buprenorphine-Naloxone
Buprenorphine Hcl/Naloxone Hcl
96
Amlodipine Besylate
92
Tramadol Hcl
90
Lisinopril
78
Gabapentin
69
Metoprolol Succinate
67
Omeprazole
67
Albuterol Sulfate Hfa
Albuterol Sulfate
63
Cyclobenzaprine Hcl
62
Lisinopril-Hydrochlorothiazide
Lisinopril/Hydrochlorothiazide
59

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

General Practice Physician Overview

How THOMAS MILLIKAN, MD fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

THOMAS MILLIKAN, MD's 2,475 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in Indiana

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS MILLIKAN, MD's specialty?
THOMAS MILLIKAN, MD specializes in General Practice Physician and practices in NEW CASTLE, Indiana. Credentials: MD.
How much does THOMAS MILLIKAN, MD prescribe under Medicare Part D?
In 2023, THOMAS MILLIKAN, MD wrote 2,475 Medicare Part D claims totaling $207K in drug costs for 99 beneficiaries.
Where is THOMAS MILLIKAN, MD located?
THOMAS MILLIKAN, MD is located at 700 S 14TH ST, NEW CASTLE, IN, 47362. Phone: (765) 521-0832.
What is THOMAS MILLIKAN, MD's NPI number?
THOMAS MILLIKAN, MD's National Provider Identifier (NPI) is 1588727606, issued on 12/19/2006.
Does THOMAS MILLIKAN, MD prescribe more brand-name or generic drugs?
THOMAS MILLIKAN, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $149K in brand drug costs.
Does THOMAS MILLIKAN, MD prescribe opioids?
Yes, THOMAS MILLIKAN, MD had 180 opioid claims in 2023 with an opioid prescribing rate of 7.3%.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does THOMAS MILLIKAN, MD prescribe most often?
Based on 2023 Medicare Part D data, THOMAS MILLIKAN, MD's most frequently prescribed drugs include Buprenorphine-Naloxone, Amlodipine Besylate, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS MILLIKAN, MD accept Medicare?
THOMAS MILLIKAN, MD appears in CMS Medicare data with 2,475 Part D claims and 99 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS MILLIKAN, MD's credentials?
THOMAS MILLIKAN, MD's NPI is 1588727606 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