DR. WILLIAM LARRY II DAVIDSON (MD) – Allergy & Immunology Physician, NPI 1578583191
Allergy & Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
58 ALLERGY/IMMUNOLOGY in AL
Provider Addresses for DR. WILLIAM LARRY II DAVIDSON (MD)
2001 Spring Hill Ave
Mobile, AL 366073326
Phone: (251) 433-3344
Fax: (251) 433-4052
Type: Location
100 Memorial Hospital Dr Ste 1A
Mobile, AL 366081128
Phone: (251) 343-6848
Fax: (251) 343-5708
Type: Location
5955 Airport Blvd
Mobile, AL 366083135
Phone: (251) 633-0573
Fax: (251) 633-7367
Type: Location
Mobile Post Office, 250, Saint Joseph Street, Downtown, Mobile County Commission District 1, Mobile, Mobile County, Alabama, 36601, United States
MOBILE, AL 366700987
Phone: (251) 633-0573
Fax: (251) 633-7367
Type: Mailing
64, County Road 13, Belforest, Daphne, Baldwin County, Alabama, 36526, United States
DAPHNE, AL 36526
Phone: (251) 625-1370
Fax: (251) 625-1380
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 303 Open Payments records for all available years, with a total value of $41,891.
Total Amount is formed as General ($41,891) + Research ($0) + Ownership ($0) = $41,891.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($35,263).
Total Amount
$41,891
General + Research + Ownership
Payments
303
Total payment records
General Amount
$41,891
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $35,263 |
| Blueprint Medicines Corporation | $1,132 |
| AstraZeneca Pharmaceuticals LP | $1,024 |
| GENZYME CORPORATION | $690 |
| CSL Behring | $591 |
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: 2006-04-10
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 |
|---|---|---|---|---|
| I20060410000656 | I | Allergy/Immunology | AL | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 95004 | Test for allergy using allergenic extract | 1,815 | 37 | $0 |
| 95165 | Professional service for preparation and provision of 1 or more antigens | 1,270 | 12 | $0 |
| 95024 | Test for allergy using allergenic extract injected into skin | 250 | 15 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 222 | 124 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 201 | 29 | $0 |
Insurance plans in this area (ZIP 36607)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Pulmonary Disease | AL | |
| Nurse Practitioner | AL | |
| Nurse Practitioner | AL | |
| Pulmonary Disease, Internal Medicine | AL | |
| Nurse Practitioner | AL | |
| Sleep Medicine, Critical Care (Intensivists), Pulmonary Disease | AL | |
| Pulmonary Disease, Critical Care (Intensivists) | AL | |
| Nurse Practitioner | AL | |
| Pulmonary Disease, Critical Care (Intensivists) | AL | |
| Nurse Practitioner | AL |
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