Gregory Fredrick Hertwig
Anesthesiology Physician · Spartanburg, SC
Gregory Fredrick Hertwig is an anesthesiology physician with a practice address in Spartanburg, South Carolina, and NPI 1013303627, issued on Apr 9, 2015. Check the license (South Carolina 83883, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregory Fredrick Hertwig
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 83883 SC
Self-reported in NPPES; status is on the state search - Practice location
- 101 E Wood St, Spartanburg, SC 29303
- Phone
- (864) 560-6122
- Enumerated
- Apr 9, 2015
- Record last updated
- Jul 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (864) 560-6276
- Medicare enrollment
- Enrolled (PECOS I20200904001310); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 787 in South Carolina → Look up another NPI →
Also registered at 101 E Wood St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Martine Abouchabki, PHARMDPharmacist1952299356
- Samuel Adams, MDInternal Medicine Physician1568026607
- Samuel Adediran, M.D.,Hematology & Oncology Physician1811259096
Verify Gregory Fredrick Hertwig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 83883Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 96.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $42.32
1 payment: food and beverage; the largest payer was Peerless Surgical Inc. The 17,774 providers of this specialty with any payment received $669.59 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.
One hospital affiliation
- Spartanburg Medical CenterSpartanburg, SC · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gregory Fredrick Hertwig among 787 anesthesiology physician records in South Carolina
Gregory Fredrick Hertwig is one of 787 anesthesiology 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 2015, is newer than 71% of them.
- NPI issued2015 · 71% of these records are older, 27% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2015 · median 2007 among the 530 with a school on file
- Record last updated2020 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in South Carolina
There are 787 anesthesiology physician records in South Carolina.
All 787 in South Carolina → Every provider in Spartanburg → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Joel Boylan, M.D.Spartanburg, SC 293031912994492
- Adam Evec, DOSpartanburg, SC 293031003029323
- Richard Forrest, M.D.Spartanburg, SC 293031811122468
- Steven Hauck, MDSpartanburg, SC 293031275796062
- Hobson Hornbuckle, M.DSpartanburg, SC 293031083601751
- John Johnson, M.D.Spartanburg, SC 293031891782561
- Beth Levine, MDSpartanburg, SC 293031114990959
- Keith May, M.D.Spartanburg, SC 293031568543890
Common questions
What is Gregory Fredrick Hertwig's NPI number?
Gregory Fredrick Hertwig's National Provider Identifier (NPI) is 1013303627, issued on Apr 9, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Fredrick Hertwig located?
The NPPES record lists a practice address at 101 E Wood St, Spartanburg, SC, 29303. Phone: (864) 560-6122. Providers update this record themselves, so call before visiting.
How can I verify Gregory Fredrick Hertwig's license?
NPPES lists South Carolina license number 83883, 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.
What is Gregory Fredrick Hertwig's MIPS final score?
The 2023 MIPS final score is 96.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.