Doctor profile · Federal record
Dr. Mary Chao, D.O.
Internal Medicine Physician (CMS: Internal Medicine) · Lansing, MI
- NPI 1881814002
- Accepts Medicare
- 22 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1540 Lake Lansing RD, Suite 102
Lansing, MI 489123756
(517) 913-3810
fax (517) 913-3811
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- September 11, 2012
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Michigan #5101016242
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1881814002. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
533
Distinct HCPCS
5
Medicare allowed
$48,103
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 304 | 159 | $95 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 149 | 107 | $65 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 52 | 52 | $125 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 17 | 17 | $95 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 11 | 11 | $131 |
In context: peer comparison
Among 30 peers in Lansing Internal Medicine Physician, average services per provider: 105. This provider delivers 5.1× the peer median.Open Payments
Industry payments received
All-time total
$849
Transactions
44
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Pfizer INC. | 9 | $173.19 | |
| Lilly USA, LLC | 8 | $133.89 | |
| GlaxoSmithKline, LLC. | 4 | $71.75 | |
| Amgen INC. | 4 | $71.45 | |
| Novo Nordisk INC | 4 | $68.70 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 3 | $55.30 | |
| Iti, INC. (D/B/A Intra-Cellular Therapies, INC.) | 2 | $42.63 | |
| Exact Sciences Corporation | 2 | $30.28 | |
| Merck Sharp & Dohme LLC | 1 | $28.33 | |
| Shield Therapeutics INC | 2 | $28.16 | |
| Averitas Pharma INC. | 1 | $22.40 | |
| Novartis Pharmaceuticals Corporation | 1 | $21.50 | |
| Abbott Laboratories | 1 | $19.35 | |
| Mylan Specialty L.P. | 1 | $19.31 | |
| Sumitomo Pharma America, INC. | 1 | $16.27 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
5,152
Patients
1,519
Total drug cost
$90,855
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 728 | 202 | $16,136 |
| Atorvastatin Calcium | Generic | 495 | 154 | $7,715 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 433 | 100 | $8,716 |
| Losartan Potassium | Generic | 419 | 138 | $7,702 |
| Omeprazole | Generic | 395 | 129 | $7,541 |
| Amlodipine Besylate | Generic | 377 | 114 | $3,150 |
| Alprazolam | Generic | 347 | 79 | $1,549 |
| Rosuvastatin Calcium | Generic | 315 | 97 | $6,067 |
| Lisinopril | Generic | 311 | 99 | $3,226 |
| Tramadol Hcl | Generic | 276 | 54 | $2,145 |
Hospital affiliations
Frequently asked questions
What is Dr. Mary Chao's medical specialty?
Dr. Mary Chao practices Internal Medicine Physician in Lansing, MI.
Where does Dr. Mary Chao practice?
Dr. Mary Chao practices at 1540 Lake Lansing RD, Lansing, MI 489123756. Office phone: 5179133810.
What is Dr. Mary Chao's NPI?
Dr. Mary Chao's National Provider Identifier (NPI) is 1881814002, issued by NPPES.
Does Dr. Mary Chao accept Medicare assignment?
Yes. Dr. Mary Chao accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Chao commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.