Tong Gan, M.D.
NPI 1275941791 · Colon & Rectal Surgery Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tong Gan, M.D. is a Colon & Rectal Surgery Physician provider in Grand Rapids, MI (NPI 1275941791).
Provider details
- NPI number
- 1275941791
- Entity type
- Individual
- Primary specialty
- Colon & Rectal Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301507236 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
147 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 31 | $6 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 21 | $80 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 20 | $254 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 17 | $151 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 17 | $89 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 113 | 110 |
| Metronidazole | 52 | 47 |
| Neomycin Sulfate | 38 | 36 |
| Hydrocortisone | 34 | 25 |
| Oxycodone Hcl | 26 | 21 |
| Ciprofloxacin Hcl | 12 | 11 |
| Tramadol Hcl | 12 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$238 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-07-28
- Last updated
- 2022-10-10
- Certified
- 2022-10-10
Frequently asked questions
- What is Tong Gan's NPI number?
- Tong Gan's National Provider Identifier (NPI) is 1275941791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tong Gan's specialty?
- Tong Gan is listed in the NPPES registry with a primary specialty of Colon & Rectal Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Tong Gan located?
- Tong Gan's practice location on file with NPPES is 4100 Lake Dr Se Ste 205, Grand Rapids, MI 49546-8292.
- What is Tong Gan's phone number?
- The practice phone number listed in the NPPES registry for Tong Gan is (616) 267-7100.
- Does Tong Gan accept Medicare?
- Tong Gan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tong Gan's NPI active?
- Yes — Tong Gan's NPI (1275941791) is active in the NPPES registry as of the last update on 2022-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.