Colby H. Grossman, M.D.
Internal Medicine Physician · Summerville, SC
Colby H. Grossman, M.D. is an internal medicine physician with a practice address in Summerville, South Carolina, and NPI 1619952371, issued on Dec 14, 2005. Check the license (South Carolina 12448, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Colby H. Grossman
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 12448 SC
Self-reported in NPPES; status is on the state search - Practice location
- 201 Oakbrook LN, Summerville, SC 29485
- Phone
- (843) 695-8464
- Enumerated
- Dec 14, 2005
- Record last updated
- Jun 20, 2024
- Fax
- (843) 695-8424
- Medicare enrollment
- Enrolled (PECOS I20040708000239); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Verify Colby H. Grossman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 12448Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,582 Medicare Part D claims for 270 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 230 claims were for opioids.
Most prescribed
- Levothyroxine Sodium290 claims
- Rosuvastatin Calcium289 claims
- Amlodipine Besylate266 claims
- Ezetimibe255 claims
- Omeprazole215 claims
- Farxiga214 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: $734.94
35 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Colby H. Grossman among 1,881 internal medicine physician records in South Carolina
Colby H. Grossman, M.D. is one of 1,881 internal medicine physician records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1983 · median 2006 among the 1,119 with a school on file
- Record last updated2024 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in South Carolina
There are 1,881 internal medicine physician records in South Carolina.
All 1,881 in South Carolina → Every provider in Summerville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Karan BarringSummerville, SC 294851174263651
- David Bolster, M.D.Summerville, SC 294851144205824
- William Cook, M.D.Summerville, SC 294851750344263
- Jeffrey Herman, M.D.Summerville, SC 294851043358286
- Benoit Lebrun, DOSummerville, SC 294851073016721
- Brittany Lyons, DOSummerville, SC 294851255725487
- Juan Camacho Velazquez, M.D.Summerville, SC 294861063816528
- Jared GuichardSummerville, SC 294861669734760
Common questions
What is Colby H. Grossman, M.D.'s NPI number?
Colby H. Grossman, M.D.'s National Provider Identifier (NPI) is 1619952371, issued on Dec 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Colby H. Grossman, M.D. located?
The NPPES record lists a practice address at 201 Oakbrook LN, Summerville, SC, 29485. Phone: (843) 695-8464. Providers update this record themselves, so call before visiting.
How can I verify Colby H. Grossman, M.D.'s license?
NPPES lists South Carolina license number 12448, 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 Colby H. Grossman, M.D. prescribe under Medicare Part D?
In 2024, Colby H. Grossman, M.D. had 7,582 Medicare Part D claims for 270 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.