Karen Spitler, APRN, BC
NPI 1225001209 · Adult Health Nurse Practitioner · Cambridge, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Spitler, APRN, BC is a Adult Health Nurse Practitioner provider in Cambridge, MA (NPI 1225001209).
Provider details
- NPI number
- 1225001209
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, BC
- Sex
- Female
- License
- 152046 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
19 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 19 | $53 |
Typical Medicare-allowed amounts for these services range $53–$53 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Karen Spitler's NPI number?
- Karen Spitler's National Provider Identifier (NPI) is 1225001209, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Spitler's specialty?
- Karen Spitler is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Spitler located?
- Karen Spitler's practice location on file with NPPES is 77 Mass Ave, Cambridge, MA 02139-4301.
- What is Karen Spitler's phone number?
- The practice phone number listed in the NPPES registry for Karen Spitler is (617) 253-1311.
- Does Karen Spitler accept Medicare?
- Karen Spitler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Spitler's NPI active?
- Yes — Karen Spitler's NPI (1225001209) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.