Shaffer Mok, M.D.
NPI 1275878787 · Gastroenterology Physician · Columbia, MD
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shaffer Mok, M.D. is a Gastroenterology Physician provider in Columbia, MD (NPI 1275878787).
Provider details
- NPI number
- 1275878787
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME153258 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
349 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) |
|---|---|---|
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 100 | $64 |
| Ultrasound Guided Needle Aspiration Or Biopsy of Esophagus Using a Flexible Endoscope43238 | 40 | $220 |
| Destruction of Polyp Or Growth of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43270 | 40 | $203 |
| Ultrasound Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope Through Mouth43237 | 36 | $181 |
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 26 | $22 |
| Insertion of Stent Into Pancreatic Or Bile Duct Using a Flexible Endoscope43274 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sucralfate | 66 | 26 |
| Omeprazole | 43 | 24 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 22 | 21 |
| Pantoprazole Sodium | 21 | — |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 16 | 14 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 16 | 15 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,421 across 7 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
Additional practice locations (3)
- 4940 Campbell Blvd Ste 140Baltimore, MD 21236-5910Phone: (410) 290-6677Fax: (410) 290-6676
- 1212 York Rd Ste B101Lutherville, MD 21093-6233Phone: (410) 290-6677Fax: (410) 290-6676
- 21 Crossroads Dr Ste 205Owings Mills, MD 21117-5483Phone: (410) 290-6677Fax: (410) 290-6676
Registry dates
- Enumerated
- 2012-12-10
- Last updated
- 2026-05-10
- Certified
- 2026-05-10
Frequently asked questions
- What is Shaffer Mok's NPI number?
- Shaffer Mok's National Provider Identifier (NPI) is 1275878787, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shaffer Mok's specialty?
- Shaffer Mok is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Shaffer Mok located?
- Shaffer Mok's practice location on file with NPPES is 7120 Minstrel Way Ste 100, Columbia, MD 21045-5274.
- What is Shaffer Mok's phone number?
- The practice phone number listed in the NPPES registry for Shaffer Mok is (410) 290-6677.
- Does Shaffer Mok accept Medicare?
- Shaffer Mok is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shaffer Mok's NPI active?
- Yes — Shaffer Mok's NPI (1275878787) is active in the NPPES registry as of the last update on 2026-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.