2026 NPPES data Internal Medicine Physician NPI 1588658504 MD
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DONALD BALES, MD

Internal Medicine Physician in ROCKY MOUNT, North Carolina. 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
3K
Medicare Part D claims · 413 beneficiaries · Internal Medicine Physician avg: 3K
What the federal data reveals: DONALD BALES, MD is a Internal Medicine Physician ([object Object]) practicing in ROCKY MOUNT, North Carolina with a Medicare Part D prescribing footprint of 3K claims across 413 beneficiaries .

What stands out: DONALD BALES, MD filed 2,674 Medicare Part D claims in 2023 across ROCKY MOUNT, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

DONALD BALES, 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).

DONALD BALES, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/06/2005

NPI 1588658504

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,674 2% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in North Carolina

How Internal Medicine Physician compares to other specialties among North Carolina providers

North Carolina providers

Internal Medicine Physician share within North Carolina

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

Specialty board-certification context

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

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

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

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

DONALD BALES, MD is a Internal Medicine Physician provider practicing in ROCKY MOUNT, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1588658504. 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.

DONALD BALES, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 91 ENTERPRISE DR, ROCKY MOUNT, NC, 27804, with a listed phone of (252) 937-0235. NPI 1588658504 was issued on 09/06/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BALES 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 2,674 prescription claims written by this provider, covering 413 Medicare beneficiaries and totaling roughly $228K in drug spend, with an opioid prescribing rate of 0.4%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

91 ENTERPRISE DR
ROCKY MOUNT, NC 27804

Provider Details

NPI 1588658504
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 09/06/2005

Medicare Part D Prescribing Data

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

2,674
Total Claims
$228K
Total Drug Cost
413
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,464
Total Day Supply
162,797
Generic Drug Cost
$37K
Opioid Claims
12 (0.4% rate)

Patient Demographics

Average Patient Age
75.7 years
Avg HCC Risk Score
1.12
Gender Split
45% female / 55% male
Age Distribution
<65: 15, 65-74: 182, 75-84: 156, 85+: 60

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
209
Losartan Potassium
166
Metoprolol Succinate
118
Rosuvastatin Calcium
111
Hydrochlorothiazide
106
Atorvastatin Calcium
99
Metformin Hcl Er
Metformin Hcl
80
Levothyroxine Sodium
71
Lisinopril
64
Alprazolam
61

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

Internal Medicine Physician Overview

How DONALD BALES, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

DONALD BALES, MD's 2,674 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as BALES.

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

Frequently Asked Questions

What is DONALD BALES, MD's specialty?
DONALD BALES, MD specializes in Internal Medicine Physician and practices in ROCKY MOUNT, North Carolina. Credentials: MD.
How much does DONALD BALES, MD prescribe under Medicare Part D?
In 2023, DONALD BALES, MD wrote 2,674 Medicare Part D claims totaling $228K in drug costs for 413 beneficiaries.
Where is DONALD BALES, MD located?
DONALD BALES, MD is located at 91 ENTERPRISE DR, ROCKY MOUNT, NC, 27804. Phone: (252) 937-0235.
What is DONALD BALES, MD's NPI number?
DONALD BALES, MD's National Provider Identifier (NPI) is 1588658504, issued on 09/06/2005.
Does DONALD BALES, MD prescribe opioids?
Yes, DONALD BALES, MD had 12 opioid claims in 2023 with an opioid prescribing rate of 0.4%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does DONALD BALES, MD prescribe most often?
Based on 2023 Medicare Part D data, DONALD BALES, MD's most frequently prescribed drugs include Amlodipine Besylate, Losartan Potassium, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DONALD BALES, MD accept Medicare?
DONALD BALES, MD appears in CMS Medicare data with 2,674 Part D claims and 413 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DONALD BALES, MD's credentials?
DONALD BALES, MD's NPI is 1588658504 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