2026 NPPES data Family Medicine Physician NPI 1083027056 D.O.
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ROBERT MILLS, D.O.

Family Medicine Physician in TIMONIUM, Maryland. 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 · 331 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

ROBERT MILLS, D.O. filed 2,018 Medicare Part D claims in 2023 as a Family Medicine Physician in TIMONIUM, Maryland, prescribing 87% generic.

2K
Part D claims, 2023
87%
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.

ROBERT MILLS, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

2,018 Top 16% higher than 84% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

ROBERT MILLS, D.O. 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 ROBERT MILLS, D.O.?

Quality data not reported

NPI registry status

Active

Issued 06/08/2014

NPI 1083027056

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

2,018 41% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Maryland

How Family Medicine Physician compares to other specialties among Maryland providers

Maryland providers

Family Medicine Physician share within Maryland

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

Specialty board-certification context

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

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

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

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

ROBERT MILLS, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 63 E PADONIA RD STE 100, TIMONIUM, MD, 21093, with a listed phone of (443) 589-5252. NPI 1083027056 was issued on 06/08/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MILLS 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 2,018 prescription claims written by this provider, covering 331 Medicare beneficiaries and totaling roughly $188K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 3.0%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

63 E PADONIA RD STE 100
TIMONIUM, MD 21093

Provider Details

NPI 1083027056
Specialty Family Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 06/08/2014

Hospital and facility affiliations

Facilities where ROBERT MILLS, D.O. 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.

JOHNS HOPKINS COMMUNITY PHYSICIANS, INC
BALTIMORE, MD

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

Brand vs generic prescribing mix · Typical

ROBERT MILLS, D.O. — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 2,018 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.

2,018
Total Claims
$188K
Total Drug Cost
331
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,667
Total Day Supply
135,664
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$150K
Generic Drug Cost
$35K
Opioid Claims
61 (3.0% rate)
Antibiotic Claims
37

Patient Demographics

Average Patient Age
73.1 years
Avg HCC Risk Score
1.04
Gender Split
55% female / 45% male
Age Distribution
<65: 30, 65-74: 142, 75-84: 133, 85+: 26

Top Prescribed Drugs (Medicare Part D)

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

What ROBERT MILLS, D.O. 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
Atorvastatin Calcium
152
Levothyroxine Sodium
90
Lisinopril
87
Amlodipine Besylate
81
Losartan Potassium
78
Rosuvastatin Calcium
59
Metoprolol Succinate
51
Omeprazole
41
Pantoprazole Sodium
41
Pravastatin Sodium
33

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

Family Medicine Physician Overview

How ROBERT MILLS, D.O. fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

ROBERT MILLS, D.O.'s 2,018 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Maryland

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

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

Frequently Asked Questions

What is ROBERT MILLS, D.O.'s specialty?
ROBERT MILLS, D.O. specializes in Family Medicine Physician and practices in TIMONIUM, Maryland. Credentials: D.O..
How much does ROBERT MILLS, D.O. prescribe under Medicare Part D?
In 2023, ROBERT MILLS, D.O. wrote 2,018 Medicare Part D claims totaling $188K in drug costs for 331 beneficiaries.
Where is ROBERT MILLS, D.O. located?
ROBERT MILLS, D.O. is located at 63 E PADONIA RD STE 100, TIMONIUM, MD, 21093. Phone: (443) 589-5252.
What is ROBERT MILLS, D.O.'s NPI number?
ROBERT MILLS, D.O.'s National Provider Identifier (NPI) is 1083027056, issued on 06/08/2014.
Does ROBERT MILLS, D.O. prescribe more brand-name or generic drugs?
ROBERT MILLS, D.O.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $150K in brand drug costs.
Does ROBERT MILLS, D.O. prescribe opioids?
Yes, ROBERT MILLS, D.O. had 61 opioid claims in 2023 with an opioid prescribing rate of 3.0%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does ROBERT MILLS, D.O. prescribe most often?
Based on 2023 Medicare Part D data, ROBERT MILLS, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT MILLS, D.O. accept Medicare?
ROBERT MILLS, D.O. appears in CMS Medicare data with 2,018 Part D claims and 331 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT MILLS, D.O.'s credentials?
ROBERT MILLS, D.O.'s NPI is 1083027056 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