Dr. Ryan Mui , DO
Internal Medicine β’ Lansing, MI
401 W Greenlawn Ave
Lansing, MI 489102819
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on May 21, 2019; this date does not establish years in practice.
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Published CMS data list 21 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Pantoprazole Sodium β 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Lansing, MI (2024, 94 clinicians with data). Median for this group: 148. Middle half: 83 to 2,213.
Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Michigan (2024, 3,463 clinicians with data). Median for this group: 801. Middle half: 94 to 5,032.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 91 in 2020 to 21 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2020β2024.
Practice Location & Contact Primary Location
401 W Greenlawn Ave
Lansing, MI 489102819
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 3 distinct group names: Edward W Sparrow Hospital Association; Mclaren Northern Michigan; Sparrow Carson Hospital. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Michigan State University College Of Osteopathic Medicine
2019
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
29 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$277 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $76.44 across 4 records.
By nature of payment
- Food and Beverage: $76.44 across 4 records.
Reporting-company totals
- Madrigal Pharmaceuticals: $37.72 across 2 records.
- Regeneron Pharmaceuticals, Inc.: $21.25 across 1 record.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $17.47 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2019
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mui has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Mui as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lansing and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Lansing, MI (2024, 94 clinicians with data). Median for this group: 148. Middle half: 83 to 2,213.
Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Michigan (2024, 3,463 clinicians with data). Median for this group: 801. Middle half: 94 to 5,032.
Part D drug cost
A lower Part D drug cost than 90% of clinicians listed under Internal Medicine in Lansing, MI (2024, 94 clinicians with data). Median for this group: $13,988. Middle half: $1,477 to $261,021.
A lower Part D drug cost than 85% of clinicians listed under Internal Medicine in Michigan (2024, 3,463 clinicians with data). Median for this group: $66,958. Middle half: $1,946 to $462,816.
135 active clinicians are listed under Internal Medicine with a practice address in Lansing, MI (5,741 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lansing
9.6% of these 135 clinicians have the CMS telehealth indicator.
51.1% of these 135 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 77% from 91 in 2020 to 21 in 2024.
- 2020: 91
- 2021: 218
- 2022: 88
- 2023: 42
- 2024: 21
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30-day fills
30-day fills decreased 74% from 110 in 2020 to 29 in 2024.
- 2020: 110
- 2021: 280
- 2022: 123
- 2023: 50
- 2024: 29
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Part D drug cost
Part D drug cost went from $672 in 2020 to $277 in 2024.
- 2020: $672
- 2021: $4,050
- 2022: $1,182
- 2023: $439
- 2024: $277
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $96.14 in 2021 to $76.44 in 2025.
- 2021: $96.14
- 2022: $208.35
- 2023: $258.27
- 2024: $236.70
- 2025: $76.44
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $76.44.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
|
REZDIFFRA | General | $21.41 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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DUPIXENT | General | $21.25 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $17.47 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $16.31 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 21 | 766 | $276.99 | β |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-08-08NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20250711003453
MI
3971836669
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Mclaren Northern Michigan
416 Connable Ave, Petoskey, MI 497702212
Phone: 2314874000
Sparrow Carson Hospital
406 E Elm St, Carson City, MI 488119693
Phone: 9895843131
Edward W Sparrow Hospital Association
2909 E Grand River Ave, Lansing, MI 489124335
Phone: 5172536320
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Student in an Organized Health Care Education/Training Program
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History
NPI enumerated May 21, 2019.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from June 2019 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Lansing
- Dr. Michael Kowalczyk, DO
- Zhi Li
- Dr. Travis Hoover, DO
- Dr. Zachary Hanafi, DO
- Dr. Christopher Alvarado, DO
- Dr. Robert Gumbita, DO
Mailing Address
401 W Greenlawn Ave
Lansing, MI 489102819
Phone: 5179756000