DR. LAWRENCE R HENNESSEY (M.D.) – Allergy & Immunology Physician, NPI 1629078142
Allergy & Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
177 ALLERGY/IMMUNOLOGY in MI
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Provider Addresses for DR. LAWRENCE R HENNESSEY (M.D.)
3955, Okemos Road, Okemos, Meridian Charter Township, Ingham County, Michigan, 48864, United States
SUITE A1
OKEMOS, MI 488644208
Phone: (517) 349-0027
Fax: (517) 349-5882
Type: Location
3955 Okemos Rd
Suite A1
Okemos, MI 488644208
Phone: (517) 349-0027
Fax: (517) 349-5882
Type: Location
3621 S STATE ST
ANN ARBOR, MI 481081633
Phone: (734) 647-5299
Type: Mailing
325 BRIARWOOD CIR
ANN ARBOR, MI 481081605
Phone: (734) 647-5940
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $94.
Total Amount is formed as General ($94) + Research ($0) + Ownership ($0) = $94.
Last reported payment date: 2024-08-10 • Largest payer in this snapshot: Genentech USA, Inc. ($94).
Total Amount
$94
General + Research + Ownership
Payments
1
Total payment records
General Amount
$94
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Genentech USA, Inc. | $94 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-06-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050603000873 | I | Allergy/Immunology | MI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 48864)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ALLERGY/IMMUNOLOGY | MI | 95004 | Injection of allergenic extracts into skin, accessed through the skin | 1342 | 29 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | FL | |
| Physical Medicine And Rehabilitation | MI | |
| A N E S T H E S I O L O G Y | MI | |
| Internal Medicine, Pediatric Medicine | IL | |
| - | MI | |
| Physician Assistant | MI |
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