NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1588727606 MD
Verify on CMS → Thomas Millikan, MD
General Practice Physician in New Castle, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,725 in General Practice Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 99 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
91%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Thomas Millikan, MD filed 2,475 Medicare Part D claims in 2023 as a General Practice Physician in New Castle, Indiana, prescribing 91% generic.
- 2K
- Part D claims, 2023
- 91%
- 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.
Thomas Millikan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,475 Top 14% higher than 86% of 1,370,886 prescribers
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)
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).
What does the federal data show about Thomas Millikan, MD?
Quality data not reportedPrimary specialty
General Practice Physician
Medicare Part D claims
2,475 14% vs specialty avg
Specialty distribution in Indiana
How General Practice Physician compares to other specialties among Indiana providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for General Practice Physician. Verify directly:
How MIPS and board certification work
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 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.
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 91% generic by claim count, with an opioid prescribing rate of 7.3%.
General Practice Physician is a mid-sized specialty nationwide, with 16,725 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
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%
General Practice Physician average
8% brand-name claims vs 91% 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 / 91% 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.
What Thomas Millikan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
96 claims
- Amlodipine Besylate
Amlodipine Besylate
92 claims
- Tramadol Hcl
Tramadol Hcl
90 claims
- Lisinopril
Lisinopril
78 claims
- Gabapentin
Gabapentin
69 claims
- Metoprolol Succinate
Metoprolol Succinate
67 claims
- Omeprazole
Omeprazole
67 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
63 claims
| 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.
16,725
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.
Dr. Raechel Ackerman
DO
Indianapolis, IN
Dr. Jerome Adams
MD
Muncie, IN
Dr. Jerry Adams
MD
Indianapolis, IN
Dr. Peter Adams
M.D.
Charlestown, IN
Dr. John Addo
MD
Fort Wayne, IN
Compare General Practice Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby General Practice Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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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 91% 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 16,725 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.