John Hallmark, MD
Surgery Physician · Charleston, SC
John Hallmark, MD is a surgery physician with a practice address in Charleston, South Carolina, and NPI 1588307516, issued on Apr 18, 2022. Check the license (South Carolina LL88000, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Hallmark
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- LL88000 SC
Self-reported in NPPES; status is on the state search - Practice location
- 169 Ashley Avenue, Charleston, SC 29425
- Phone
- (843) 792-4607
- Enumerated
- Apr 18, 2022
- Record last updated
- Jun 10, 2022
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 647 in South Carolina → Look up another NPI →
Also registered at 169 Ashley Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John 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 LL88000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average surgery physician in 2024
44 Medicare Part D claims for 33 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 22 claims were for opioids.
Most prescribed
- Oxycodone Hcl20 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.
Industry payments in 2024: $196.88
2 payments; by number, the most common kind was food and beverage; the largest payer was Atricure, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John Hallmark among 647 surgery physician records in South Carolina
John Hallmark, MD is one of 647 surgery physician records with a practice address in South Carolina. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 77% of them.
- NPI issued2022 · 77% of these records are older, 17% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2022 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
167 surgery physician records list a practice address in Charleston
They are 167 of the 10,840 NPPES records with a practice address in Charleston, and 647 surgery physician records in South Carolina.
All 647 in South Carolina → Every provider in Charleston → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- David Adams, MDCharleston, SC 294251467566968
- Prabhakar Baliga, MDCharleston, SC 294251255364709
- Sapna Bazaz, M.B.B.S, MDCharleston, SC 294251467537100
- Scott Bradley, MDCharleston, SC 294251346355351
- Thomas Byrne, MDCharleston, SC 294251972617520
- Denise Carneiro-Pla, MDCharleston, SC 294251144344805
- David Cole, MDCharleston, SC 294251649384108
- Fred Crawford, MDCharleston, SC 294251134233760
Common questions
What is John Hallmark, MD's NPI number?
John Hallmark, MD's National Provider Identifier (NPI) is 1588307516, issued on Apr 18, 2022. An NPI identifies a provider in billing; it is not a license.
Where is John Hallmark, MD located?
The NPPES record lists a practice address at 169 Ashley Avenue, Charleston, SC, 29425. Phone: (843) 792-4607. Providers update this record themselves, so call before visiting.
How can I verify John Hallmark, MD's license?
NPPES lists South Carolina license number LL88000, 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 John Hallmark, MD prescribe under Medicare Part D?
In 2024, John Hallmark, MD had 44 Medicare Part D claims for 33 beneficiaries; the average among surgery physician prescribers was 147. 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.