Margaret Tsai, MD
NPI 1114146693 · Internal Medicine Physician · Lorain, OH
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Tsai, MD is a Internal Medicine Physician provider in Lorain, OH (NPI 1114146693).
Provider details
- NPI number
- 1114146693
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 35.087072 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
1,207 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 | 627 | $92 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 503 | $16 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 43 | $172 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 21 | $92 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 13 | $137 |
Typical Medicare-allowed amounts for these services range $16–$172 (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 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 1,150 | 309 |
| Prednisone | 1,016 | 344 |
| Methotrexate Sodiumbrand: Methotrexate | 697 | 198 |
| Gabapentin | 504 | 136 |
| Alendronate Sodium | 325 | 107 |
| Allopurinol | 300 | 91 |
| Leflunomide | 274 | 77 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$372 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
Registry dates
- Enumerated
- 2007-04-24
- Last updated
- 2015-05-04
Frequently asked questions
- What is Margaret Tsai's NPI number?
- Margaret Tsai's National Provider Identifier (NPI) is 1114146693, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Tsai's specialty?
- Margaret Tsai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Tsai located?
- Margaret Tsai's practice location on file with NPPES is 5700 Cooper Foster-Park Road, Ln20, Lorain, OH 44053.
- What is Margaret Tsai's phone number?
- The practice phone number listed in the NPPES registry for Margaret Tsai is (440) 204-7400.
- Does Margaret Tsai accept Medicare?
- Margaret Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Tsai's NPI active?
- Yes — Margaret Tsai's NPI (1114146693) is active in the NPPES registry as of the last update on 2015-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.