Karen H. Hallmark, M.D.
Obstetrics & Gynecology Physician · Mt Pleasant, SC
Karen H. Hallmark, M.D. is an obstetrics & gynecology physician with a practice address in Mt Pleasant, South Carolina, and NPI 1982617650, issued on Aug 14, 2006. Check the license (South Carolina 20832, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Karen H. Hallmark
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 20832 SC
Self-reported in NPPES; status is on the state search - Practice location
- 3510 N Highway 17 Ste 225, Mt Pleasant, SC 29466
- Phone
- (843) 884-0301
- Enumerated
- Aug 14, 2006
- Record last updated
- Oct 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (843) 606-8036
- Medicaid ID
- 748981 SC
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 752 in South Carolina → Look up another NPI →
Also registered at 3510 N Highway 17 Ste 225
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susanne Bradford, M.D.Obstetrics & Gynecology Physician1831102417
- Phyllis Rogerson, M.D.Obstetrics & Gynecology Physician1215940978
Verify Karen H. Hallmark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 20832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
42 Medicare Part D claims for 17 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Estradiol12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Karen H. Hallmark among 752 obstetrics & gynecology physician records in South Carolina
Karen H. Hallmark, M.D. is one of 752 obstetrics & gynecology physician records with a practice address in South Carolina. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 54% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2020 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 obstetrics & gynecology physician records list a practice address in Mt Pleasant
They are 17 of the 1,043 NPPES records with a practice address in Mt Pleasant, and 752 obstetrics & gynecology physician records in South Carolina.
All 752 in South Carolina → Every provider in Mt Pleasant → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Susanne Bradford, M.D.Mt Pleasant, SC 294661831102417
- Melissa Cisa, MDMt Pleasant, SC 294661386176865
- Meghan Lynch, MDMt Pleasant, SC 294661912082595
- Betty Raney, MDMt Pleasant, SC 294661912944141
- Phyllis Rogerson, M.D.Mt Pleasant, SC 294661215940978
- Carol Simmons, MDMount Pleasant, SC 294661972228229
- Melanie Blohm, M.D.Mount Pleasant, SC 294641952714271
- Brittany Bowler, DOMount Pleasant, SC 294641174015382
Common questions
What is Karen H. Hallmark, M.D.'s NPI number?
Karen H. Hallmark, M.D.'s National Provider Identifier (NPI) is 1982617650, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen H. Hallmark, M.D. located?
The NPPES record lists a practice address at 3510 N Highway 17 Ste 225, Mt Pleasant, SC, 29466. Phone: (843) 884-0301. Providers update this record themselves, so call before visiting.
How can I verify Karen H. Hallmark, M.D.'s license?
NPPES lists South Carolina license number 20832, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen H. Hallmark, M.D. prescribe under Medicare Part D?
In 2024, Karen H. Hallmark, M.D. had 42 Medicare Part D claims for 17 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.