Karl Singer, MD
NPI 1902874746 · Family Medicine Physician · Exeter, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Singer, MD is a Family Medicine Physician provider in Exeter, NH (NPI 1902874746).
Provider details
- NPI number
- 1902874746
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4714 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
211 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 129 | $8 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 44 | $73 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 38 | $8 |
Typical Medicare-allowed amounts for these services range $8–$73 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 43 | — |
| Levothyroxine Sodium | 36 | — |
| Rivaroxabanbrand: Xarelto | 30 | — |
| Fluoxetine Hcl | 26 | — |
| Trazodone Hcl | 26 | — |
| Atorvastatin Calcium | 25 | 11 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-09
- Last updated
- 2023-11-20
- Certified
- 2023-11-20
Frequently asked questions
- What is Karl Singer's NPI number?
- Karl Singer's National Provider Identifier (NPI) is 1902874746, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Singer's specialty?
- Karl Singer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Singer located?
- Karl Singer's practice location on file with NPPES is 21 Hampton Rd Bldg 3, Exeter, NH 03833-4831.
- What is Karl Singer's phone number?
- The practice phone number listed in the NPPES registry for Karl Singer is (603) 775-0000.
- Does Karl Singer accept Medicare?
- Karl Singer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Singer's NPI active?
- Yes — Karl Singer's NPI (1902874746) is active in the NPPES registry as of the last update on 2023-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.