Karl Proppe, MD
Karl Proppe, MD holds NPI 1831197102, with a primary taxonomy of specialist and a practice location in Cambridge, MA. The number was issued on July 12, 2005 and the NPPES record was last updated on July 13, 2026.
Taxonomies and licenses
| Taxonomy | Code | License |
|---|---|---|
| Specialist Primary | 174400000X | 37618 (MA) |
Practice location
Local context
Active NPPES records list 991 providers with specialist as the primary taxonomy within 25 miles of this practice location's ZIP code, 469 of them within 10 miles.
The same primary taxonomy is listed by 1,536 in Massachusetts and 89,620 nationwide.
These are counts from NPPES records, not a ranking or recommendation. Distances are measured between ZIP code centers, not street addresses.
Record history
- Name on record
- Dr. Karl Proppe
- Status
- Active
- NPI issued
- Last updated in NPPES
Is this your record? Updates are made through NPPES, the official National Plan and Provider Enumeration System.
NPPES data as of · Source: CMS NPPES
Building software? Fetch this NPI programmatically with the NPILayer Provider API.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://api.npilayer.com/v1/providers/1831197102"