2026 NPPES data Obstetrics Physician NPI 1689663999 MD
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CHARLES HARPER, MD

Obstetrics Physician in GREENSBORO, 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
266
Medicare Part D claims · 54 beneficiaries · Obstetrics Physician avg: 319
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$104.44
6 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: CHARLES HARPER, MD is a Obstetrics Physician ([object Object]) practicing in GREENSBORO, North Carolina with a Medicare Part D prescribing footprint of 266 claims across 54 beneficiaries — 14% brand-name prescribing . Industry payments of $104.44 across 6 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: CHARLES HARPER, MD filed 266 Medicare Part D claims in 2023 across GREENSBORO, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CHARLES HARPER, 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).

CHARLES HARPER, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 10/19/2005

NPI 1689663999

Primary specialty

Obstetrics Physician

Niche

1,402 US NPIs in this specialty

Medicare Part D claims

266 17% vs specialty avg

2023 prescription claims

Specialty avg: 319

Specialty distribution in North Carolina

How Obstetrics Physician compares to other specialties among North Carolina providers

North Carolina providers

Obstetrics Physician share within North Carolina

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

Specialty board-certification context

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

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

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

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

CHARLES HARPER, MD is a Obstetrics Physician provider practicing in GREENSBORO, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1689663999. 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.

CHARLES HARPER, MD appears in the CMS NPPES registry as a Obstetrics Physician provider holding MD credentials at 802 GREEN VALLEY RD STE 200, GREENSBORO, NC, 27408, with a listed phone of (336) 389-9898. NPI 1689663999 was issued on 10/19/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HARPER 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 266 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $9K in drug spend, split 14% brand-name and 86% generic by claim count. 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.

Obstetrics Physician is a narrow specialty nationwide, with 1,402 enrolled providers across 54 states and an average of 319 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

802 GREEN VALLEY RD STE 200
GREENSBORO, NC 27408

Provider Details

NPI 1689663999
Specialty Obstetrics Physician
Credentials MD
Gender Male
NPI Issued 10/19/2005

Hospital and facility affiliations

Facilities where CHARLES HARPER, 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.

THE MOSES H CONE MEMORIAL HOSPITAL OPERATING CORPORATION
GREENSBORO, NC

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for CHARLES HARPER, MD. Source: openpaymentsdata.cms.gov.

Total received

$104

Largest payer

SHIELD THERAPEUTICS INC

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

CHARLES HARPER, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 266 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.

266
Total Claims
$9K
Total Drug Cost
54
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
295
Total Day Supply
4,646
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$5K
Generic Drug Cost
$4K
Antibiotic Claims
46

Patient Demographics

Average Patient Age
51.2 years
Avg HCC Risk Score
1.78
Gender Split
100% female / 0% 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
Fluconazole
73
Metronidazole
32
Ibuprofen
22
Climara Pro
Estradiol/Levonorgestrel
16
Tinidazole
14
Levocetirizine Dihydrochloride
12

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

Obstetrics Physician Overview

How CHARLES HARPER, MD fits within the Obstetrics Physician landscape nationally.

1,402
Obstetrics Physician Providers in US
54
States with Obstetrics Physician
319
Avg Claims per Provider

CHARLES HARPER, MD's 266 claims are below the specialty average of 319.

Nearby Obstetrics Physician Providers in North Carolina

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

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

Frequently Asked Questions

What is CHARLES HARPER, MD's specialty?
CHARLES HARPER, MD specializes in Obstetrics Physician and practices in GREENSBORO, North Carolina. Credentials: MD.
How much does CHARLES HARPER, MD prescribe under Medicare Part D?
In 2023, CHARLES HARPER, MD wrote 266 Medicare Part D claims totaling $9K in drug costs for 54 beneficiaries.
Where is CHARLES HARPER, MD located?
CHARLES HARPER, MD is located at 802 GREEN VALLEY RD STE 200, GREENSBORO, NC, 27408. Phone: (336) 389-9898.
What is CHARLES HARPER, MD's NPI number?
CHARLES HARPER, MD's National Provider Identifier (NPI) is 1689663999, issued on 10/19/2005.
Does CHARLES HARPER, MD prescribe more brand-name or generic drugs?
CHARLES HARPER, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $5K in brand drug costs.
How many Obstetrics Physician providers are there in the US?
There are 1,402 Obstetrics Physician providers across 54 states in the US. The average Obstetrics Physician provider writes 319 Medicare Part D claims per year.
What drugs does CHARLES HARPER, MD prescribe most often?
Based on 2023 Medicare Part D data, CHARLES HARPER, MD's most frequently prescribed drugs include Fluconazole, Metronidazole, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES HARPER, MD accept Medicare?
CHARLES HARPER, MD appears in CMS Medicare data with 266 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES HARPER, MD's credentials?
CHARLES HARPER, MD's NPI is 1689663999 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