2026 NPPES data Family Medicine Physician NPI 1649407321 MD
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Karla Hirshorn, MD

Family Medicine Physician in Greenville, South Carolina. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,640 in Family Medicine 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
223
Medicare Part D claims · 74 beneficiaries · Family Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Karla Hirshorn, MD filed 223 Medicare Part D claims in 2023 as a Family Medicine Physician in Greenville, South Carolina.

223
Part D claims, 2023

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.

Karla Hirshorn, MD's Medicare Part D volume vs every U.S. prescriber

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

223 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. 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-eligible specialty (heuristic, not verified)

Karla Hirshorn, 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 Karla Hirshorn, MD?

Quality data not reported

NPI registry status

Active

Issued 06/19/2009

NPI 1649407321

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

223 93% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in South Carolina

How Family Medicine Physician compares to other specialties among South Carolina providers

South Carolina providers

Largest specialties in South Carolina (% of in-state providers)

Pharmacist - 6.2%Pharmacist6.2%Mental Health Counselor - 5.1%Mental Health Counselor5.1%Family Nurse Practitioner - 4.6%Family Nurse Practitioner4.6%Physical Therapist - 4.5%Physical Therapist4.5%Behavior Technician - 3.8%Behavior Technician3.8%Speech-Language Pathologist - 3.7%Speech-Language Pathologist3.7%Family Medicine Physician - 3.1%Family Medicine Physician3.1%
Largest specialties in South Carolina (% of in-state 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 Family Medicine Physician. Verify directly:

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).

Karla Hirshorn, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 16 HYLAND RD, Greenville, SC, 29615, with a listed phone of (864) 586-9798. NPI 1649407321 was issued on 06/19/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Hirshorn 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 223 prescription claims written by this provider, covering 74 Medicare beneficiaries and totaling roughly $5K in drug spend, with an opioid prescribing rate of 7.2%. 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

16 HYLAND RD
Greenville, SC 29615

Provider Details

NPI 1649407321
Specialty Family Medicine Physician
Credentials MD
Gender Female
NPI Issued 06/19/2009

Medicare Part D Prescribing Data

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

223
Total Claims
$5K
Total Drug Cost
74
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
229
Total Day Supply
4,350
Generic Drug Cost
$3K
Opioid Claims
16 (7.2% rate)

Patient Demographics

Average Patient Age
83.8 years
Avg HCC Risk Score
2.54
Gender Split
69% female / 31% male

Top Prescribed Drugs (Medicare Part D)

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

What Karla Hirshorn, 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
Levothyroxine Sodium
18
Lisinopril
14
Escitalopram Oxalate
12

* 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 Karla Hirshorn, MD 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

Karla Hirshorn, MD's 223 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in South Carolina

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

Compare Family Medicine 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 South Carolina medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Family Medicine 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.

Frequently Asked Questions

What is Karla Hirshorn, MD's specialty?
Karla Hirshorn, MD specializes in Family Medicine Physician and practices in Greenville, South Carolina. Credentials: MD.
How much does Karla Hirshorn, MD prescribe under Medicare Part D?
In 2023, Karla Hirshorn, MD wrote 223 Medicare Part D claims totaling $5K in drug costs for 74 beneficiaries.
Where is Karla Hirshorn, MD located?
Karla Hirshorn, MD is located at 16 HYLAND RD, Greenville, SC, 29615. Phone: (864) 586-9798.
What is Karla Hirshorn, MD's NPI number?
Karla Hirshorn, MD's National Provider Identifier (NPI) is 1649407321, issued on 06/19/2009.
Does Karla Hirshorn, MD prescribe opioids?
Yes, Karla Hirshorn, MD had 16 opioid claims in 2023 with an opioid prescribing rate of 7.2%.
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 Karla Hirshorn, MD prescribe most often?
Based on 2023 Medicare Part D data, Karla Hirshorn, MD's most frequently prescribed drugs include Levothyroxine Sodium, Lisinopril, Escitalopram Oxalate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karla Hirshorn, MD accept Medicare?
Karla Hirshorn, MD appears in CMS Medicare data with 223 Part D claims and 74 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karla Hirshorn, MD's credentials?
Karla Hirshorn, MD's NPI is 1649407321 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

Compiled from official public sources by the PlainDoctor editorial team.