Mark Schrank, MD
Mark Schrank, MD is an Internal Medicine Physician in Worcester, MA, registered under NPI 1801870258.
Getting there
The practice address on file is 5 NEPONSET ST, Worcester, MA 01606. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 54140 | MA | Internal Medicine Physician primary |
This provider holds licence 54140 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1801870258 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 30, 2005 |
| Last updated | Sep 14, 2018 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
5 NEPONSET ST Worcester, MA 01606 (508) 595-2300 Fax (508) 853-5226 |
| Mailing address |
5 NEPONSET ST FL STREET12 Worcester, MA 01606 |
| Other identifiers |
042472266
· Other 27015 · Other AA1247 · Other J04376 · Other 110170358 · Other 6389589 · Other 0401699 · Other 3099911 · Other 9900099 · Other 042472266 · Other J04376 · Other 7017326 · Other J04376 · Other 27015 · Other 784187 · Other 925677 · Other J04376 · Other 042472266 · Other |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 8 | 0 | 1 | 8 | 7 | 0 | 2 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 0 | 1 | 7 | 7 | 0 | 2 | 1 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.