Physician Profile
Unclaimed ProfileAbout HERTWIG
Gregory Fredrick Hertwig is a healthcare provider in Spartanburg, SC specializing in anesthesiology. Gregory trained at University of South Carolina School of Medicine, graduating in 2015. Medicare claims data shows Gregory provided 268 services to 268 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (864) 560-6122
- Email not available
Practice Locations
101 E WOOD ST
Spartanburg, SC 29303
Procedures Most Often Billed to Medicare
268 services · 268 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of artery tube for blood sampling or infusion through skin | Procedure | 36620 |
46 |
| Injection of anesthetic agent and/or steroid into rib nerve | Procedure | 64420 |
19 |
| Injection of local anesthetic for abdominal wall pain control on both sides using imaging guidance | Procedure | 64488 |
18 |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
44 |
| Anesthesia for exam of colon using an endoscope | Anaesthesia | 00812 |
23 |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | Anaesthesia | 00731 |
22 |
| Anesthesia for procedure on heart and large blood vessels | Anaesthesia | 00560 |
15 |
| Anesthesia for procedure on chest with 1 lung inflated | Anaesthesia | 00541 |
13 |
| Anesthesia for other procedure on upper abdomen | Anaesthesia | 00790 |
12 |
| Anesthesia for placement or revision of blood flow shunt | Anaesthesia | 01844 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other anesthesiology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other anesthesiology specialists in Spartanburg 7
Same specialty, same city.
Trained at University of South Carolina School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at University of South Carolina School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of artery tube for blood sampling or infusion through skin 8
Providers in SC who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Hertwig?
Dr. Hertwig is an anesthesiology in Spartanburg, SC. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ANESTHESIOLOGY”.
NPI registry
What is Dr. Hertwig's address?
Dr. Hertwig is listed at 101 E WOOD ST, Spartanburg, SC 29303. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Hertwig?
The number on file is (864) 560-6122. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Hertwig?
Dr. Hertwig's National Provider Identifier is 1013303627. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Hertwig train?
Dr. Hertwig attended University of South Carolina School of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Hertwig have?
Dr. Hertwig has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Hertwig perform?
According to Medicare billing data, Dr. Hertwig performs procedures including insertion of artery tube for blood sampling or infusion through skin, injection of anesthetic agent and/or steroid into rib nerve and injection of local anesthetic for abdominal wall pain control on both sides using imaging guidance; reads or performs imaging such as ultrasonic guidance for blood vessel access; provides treatments such as insertion of probe in esophagus for heart ultrasound and anesthesia for exam of colon using an endoscope. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Hertwig's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hertwig. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.