Tannaz Guivatchian, MD
NPI 1285897835 · Gastroenterology Physician · Northville, MI
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tannaz Guivatchian, MD is a Gastroenterology Physician provider in Northville, MI (NPI 1285897835).
Provider details
- NPI number
- 1285897835
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301092130 (MI)
Specialties & taxonomies
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
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
88 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $98 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 17 | $247 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 15 | $138 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 15 | $79 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 12 | $108 |
Typical Medicare-allowed amounts for these services range $79–$247 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 37 | 36 |
| Omeprazole | 31 | 18 |
| Famotidine | 18 | 11 |
| Linaclotidebrand: Linzess | 16 | — |
| Pantoprazole Sodium | 13 | — |
| Nortriptyline Hcl | 11 | — |
| Opium Tincture | 11 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$112 across 1 record (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
- 2008-07-03
- Last updated
- 2018-12-13
Frequently asked questions
- What is Tannaz Guivatchian's NPI number?
- Tannaz Guivatchian's National Provider Identifier (NPI) is 1285897835, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tannaz Guivatchian's specialty?
- Tannaz Guivatchian is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Tannaz Guivatchian located?
- Tannaz Guivatchian's practice location on file with NPPES is 39901 Traditions Dr, Northville, MI 48168.
- What is Tannaz Guivatchian's phone number?
- The practice phone number listed in the NPPES registry for Tannaz Guivatchian is (888) 229-7408.
- Does Tannaz Guivatchian accept Medicare?
- Tannaz Guivatchian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tannaz Guivatchian's NPI active?
- Yes — Tannaz Guivatchian's NPI (1285897835) is active in the NPPES registry as of the last update on 2018-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.