Katherine Shaffer, M.D.
NPI 1336405695 · Student in an Organized Health Care Education/Training Program · San Diego, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Shaffer, M.D. is a Student in an Organized Health Care Education/Training Program provider in San Diego, CA (NPI 1336405695).
Provider details
- NPI number
- 1336405695
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
171 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $97 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 34 | $112 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 32 | $255 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 31 | $119 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $132 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 292 | 106 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 95 | 89 |
| Linaclotidebrand: Linzess | 64 | 18 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 53 | 50 |
| Pantoprazole Sodium | 48 | 16 |
| Famotidine | 44 | 11 |
| Loperamide Hclbrand: Loperamide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$185 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-04-11
- Last updated
- 2024-10-25
- Certified
- 2020-12-23
Frequently asked questions
- What is Katherine Shaffer's NPI number?
- Katherine Shaffer's National Provider Identifier (NPI) is 1336405695, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Shaffer's specialty?
- Katherine Shaffer is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Katherine Shaffer located?
- Katherine Shaffer's practice location on file with NPPES is 292 Euclid Ave Ste 115, San Diego, CA 92114-3629.
- What is Katherine Shaffer's phone number?
- The practice phone number listed in the NPPES registry for Katherine Shaffer is (619) 266-3332.
- Does Katherine Shaffer accept Medicare?
- Katherine Shaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Shaffer's NPI active?
- Yes — Katherine Shaffer's NPI (1336405695) is active in the NPPES registry as of the last update on 2024-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.