Dr. Mark K Li, M.D.
Dr. Mark K Li is a Internal Medicine Physician provider (Internal Medicine) practicing in Wheaton, MD, registered in the NPPES registry with NPI 1356338032 since 2005. The credential MD stands for Doctor of Medicine. Practices at Mark K Li, MD (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1356338032 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark K Li |
| Credential | M.D. |
| Sex | Male |
| Practice address | Wheaton, MD, 20902 |
| Phone | 3016495151 |
| Fax | 3016497368 |
| Enumeration date | 2005-09-29 |
| Last updated in NPPES | 2008-04-15 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | D0027865 | MD |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 85347 | Other | — | ALLIANCE |
| 3493546 | Other | — | CIGNA |
| 85347 | Other | — | MDIPA |
| 04960807 | Medicaid | DC | — |
| 110003971 | Other | DC | RAILROAD MEDICARE |
| 0075758 | Other | — | AETNA HMO |
| 4081271 | Other | — | AETNA PPO |
| 413303 | Other | — | UNITED HEALTHCARE |
| 37220001 | Other | DC | CAREFIRST BCBS (NCA) |
| 494439 | Other | — | NCPPO |
| 139301400 | Medicaid | MD | — |
| 27865 | Other | — | ADVENTIST HEALTHCARE |
| 4958MK | Other | MD | CAREFIRST BCBS (MARYLAND) |
| 85347 | Other | — | MAMSI |
| 85347 | Other | — | OPTIMUM CHOICE |
Copy-ready billing details
Provider: Mark Li, M.D. NPI: 1356338032 Taxonomy: 207R00000X (Internal Medicine Physician) Address: Wheaton, MD, 20902
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1730353855 | Mark K Li, MD | Organization | Internal Medicine Physician | Wheaton, MD |
Verify this record
Cross-check NPI 1356338032 against the authoritative CMS record: view Dr. Mark K Li on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What specialty is Mark Li?
Is this the official NPI registry?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-04-15.