Quick answers
- Does Colby H. Grossman accept Medicare assignment?
- Yes. Medicare's clinician data says Colby H. Grossman accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Colby H. Grossman see?
- In 2024, CMS data shows 281 Original Medicare patients and 7,308 services for Colby H. Grossman. This counts Original Medicare only and measures volume, not quality.
- What is Colby H. Grossman's NPI number?
- 1619952371. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Colby H. Grossman, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 281 |
|---|---|
| Services billed to Medicare | 7,308 |
| Different services or procedures | 51 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Injection, denosumab, 1 mg (J0897)2,100 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,049 services
- Insertion of needle into vein for collection of blood sample (36415)677 services
- Automated urinalysis test (81003)367 services
- Destruction of precancer skin growth, 1 growth (17000)280 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Chronic kidney disease42%
- Ischemic heart disease40%
- Diabetes35%
Hospitals where Colby H. Grossman works
Medicare's Facility Affiliation Data lists Colby H. Grossman at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bon Secours-St Francis Xavier HospitalCharleston, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420065
- Roper HospitalCharleston, SC · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 420087
- Roper St Francis Hospital-Berkeley IncSummerville, SC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 420110
- Trident Medical CenterCharleston, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420079
Practice locations
Addresses where Colby H. Grossman is enrolled with Medicare (CMS data updated October 2, 2026).
- 201 Oakbrook Ln, Suite 255Summerville, SC 29485 (843) 851‑2000
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Summerville
Clinicians with the same Medicare primary specialty in Summerville, SC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical University Of South Carolina College Of Medicine |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619952371 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians