2026 NPPES data Nephrology Physician NPI 1093717654 MD
Verify on CMS →

HAROLD DOLL, MD

Nephrology Physician in TALLAHASSEE, Florida. 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 · 374 beneficiaries · Nephrology Physician avg: 1K

What the federal data shows

HAROLD DOLL, MD filed 2,319 Medicare Part D claims in 2023 as a Nephrology Physician in TALLAHASSEE, Florida.

2K
Part D claims, 2023
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.

HAROLD DOLL, MD's Medicare Part D volume vs every U.S. prescriber

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

2,319 Top 14% higher than 86% 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)

HAROLD DOLL, MD 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 HAROLD DOLL, MD?

Quality data not reported

NPI registry status

Active

Issued 08/12/2005

NPI 1093717654

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,319 59% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Florida

How Nephrology Physician compares to other specialties among Florida providers

Florida providers

Nephrology Physician share within Florida

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

Specialty board-certification context

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

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

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

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

HAROLD DOLL, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 2617 MITCHAM DR STE 102, TALLAHASSEE, FL, 32308, with a listed phone of (850) 878-1171. NPI 1093717654 was issued on 08/12/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DOLL 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 2,319 prescription claims written by this provider, covering 374 Medicare beneficiaries and totaling roughly $475K in drug spend. 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.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

2617 MITCHAM DR STE 102
TALLAHASSEE, FL 32308

Provider Details

NPI 1093717654
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 08/12/2005

Hospital and facility affiliations

Facilities where HAROLD DOLL, MD 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.

NORTH FLORIDA NEPHROLOGY ASSOCIATES
TALLAHASSEE, FL

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

License & disciplinary context — Florida FLDOH 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 ~75K Florida medical licensees in 2023 — they are NOT specific to HAROLD DOLL, MD. To verify HAROLD DOLL, MD's current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases

FLDOH 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 Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

2,319
Total Claims
$475K
Total Drug Cost
374
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,712
Total Day Supply
135,511
Generic Drug Cost
$111K
Antibiotic Claims
46

Patient Demographics

Average Patient Age
70.3 years
Avg HCC Risk Score
5.00
Gender Split
51% female / 49% male
Age Distribution
<65: 83, 65-74: 158, 75-84: 107, 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 HAROLD DOLL, MD 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
Carvedilol
228
Furosemide
148
Nifedipine Er
Nifedipine
127
Amlodipine Besylate
114
Losartan Potassium
101
Farxiga
Dapagliflozin Propanediol
76
Allopurinol
72
Prednisone
69
Calcium Acetate
47
Clinisol
Parenteral Amino Acid 15% No.5
45

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

Nephrology Physician Overview

How HAROLD DOLL, MD fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

HAROLD DOLL, MD's 2,319 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Florida

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

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is HAROLD DOLL, MD's specialty?
HAROLD DOLL, MD specializes in Nephrology Physician and practices in TALLAHASSEE, Florida. Credentials: MD.
How much does HAROLD DOLL, MD prescribe under Medicare Part D?
In 2023, HAROLD DOLL, MD wrote 2,319 Medicare Part D claims totaling $475K in drug costs for 374 beneficiaries.
Where is HAROLD DOLL, MD located?
HAROLD DOLL, MD is located at 2617 MITCHAM DR STE 102, TALLAHASSEE, FL, 32308. Phone: (850) 878-1171.
What is HAROLD DOLL, MD's NPI number?
HAROLD DOLL, MD's National Provider Identifier (NPI) is 1093717654, issued on 08/12/2005.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does HAROLD DOLL, MD prescribe most often?
Based on 2023 Medicare Part D data, HAROLD DOLL, MD's most frequently prescribed drugs include Carvedilol, Furosemide, Nifedipine Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HAROLD DOLL, MD accept Medicare?
HAROLD DOLL, MD appears in CMS Medicare data with 2,319 Part D claims and 374 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HAROLD DOLL, MD's credentials?
HAROLD DOLL, MD's NPI is 1093717654 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