Megan Willemstein, PHARMD
Megan Willemstein, PHARMD is a Pharmacotherapy Pharmacist in Petoskey, MI, registered under NPI 1003276544.
Getting there
Here is what surrounds this office in Petoskey, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 833 ft away. If you arrive early, there is a coffee shop 0.22 mi away.
Getting here and what is nearby
Grocery Meijer 9 ft ~1 min
Parking 190 ft ~1 min
Convenience Meijer 683 ft ~3 min
2141 US 131, Petoskey 49770
Parking 704 ft ~3 min
Gas station Meijer 757 ft ~3 min
2141 US 131, Petoskey 49770
Parking 833 ft ~4 min
Gas station JBJ Trucking 0.20 mi ~4 min
2062 US 131, Petoskey 49770
Coffee Starbucks 0.22 mi ~5 min
Hotel Courtyard Petoskey at Victories Square 0.25 mi ~6 min
Hotel Super 8 0.29 mi ~6 min
Restaurant Applebee's 0.30 mi ~7 min
Restaurant Bob Evans 0.34 mi ~7 min
Restaurant Buffalo Wild Wings 0.35 mi ~8 min
Grocery ALDI 0.35 mi ~7 min
2130 Anderson Road, Petoskey 49770
Mo, We, Fr-Su 09:00-20:00, Tu, Th 08:30-20:00
Hotel Holiday Inn Express 0.43 mi ~9 min
Grocery Walmart Supercenter 0.52 mi ~11 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 5302040545 | MI | Pharmacotherapy Pharmacist primary |
This provider holds licence 5302040545 issued in MI. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Pharmacotherapy covers
A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing pharmacotherapeutic care of patients, by developing, implementing, monitoring, and modifying complex treatment plans, providing advanced level education and consultation, and collaborating with other health professionals in the management of therapy. NUCC Health Care Provider Taxonomy, code 1835P1200X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003276544 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 25, 2016 |
| Last updated | Feb 25, 2016 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | PHARMD |
| Practice address |
1201 LEARS RD Petoskey, MI 49770 (231) 348-6364 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 7 | 6 | 5 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 3 | 5 | 8 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.