Active NPI 1578583191 Individual Practitioner Male Practitioner

Dr. William Larry Davidson , MD

Allergy & Immunology • Daphne, AL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. William Davidson, MD is a certified Allergy & Immunology practicing in Daphne, AL. With approximately 25 years of clinical experience since graduating from University Of South Alabama College Of Medicine in 2001, Dr. Davidson delivers high-quality medical care to the local community at 8725 COUNTY ROAD 64.

Dr. Davidson is affiliated with Pulmonary Associates Of Mobile Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include test for allergy using allergenic extract, professional service for preparation and provision of, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

8725 County Road 64

Daphne, AL 36526

Telephone 2516251370

Fax 2516251380

Associated Practice Facility / Clinic

🏢 Pulmonary Associates Of Mobile Pc Facility NPI 1427253061

Medicare Profile & Education

Medical School

University Of South Alabama College Of Medicine

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Allergy & Immunology in Daphne, AL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs +3.0 yrs vs City Avg

City Avg: 22.0 Yrs

State Avg: 30.7 Yrs

Regional Practice Density

2 Specialists

Practicing in Daphne, AL (30 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

37.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Davidson (25 Years) 25 Yrs

Daphne Specialty Average (22.0 Years) 22.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,828	41	$10.00	$3.07
95165 Professional service for preparation and provision of 1 or more antigens	1,437	14	$16.00	$12.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	245	137	$153.00	$114.55
95024 Injection of allergenic extracts into skin for immediate reaction analysis	213	13	$11.00	$6.77
94664 Evaluation of use of breathing device	110	67	$32.00	$14.79
94375 Diagnostic testing in a pulmonary function lab	95	69	$52.00	$33.72
94200 Test to measure largest amount of air breathed in an out	95	69	$50.00	$12.59
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	77	77	$207.00	$151.54
94729 Test to examine how well the lungs exchange gases	69	54	$100.00	$48.90
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	62	51	$19.00	$15.16
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	50	32	$181.00	$164.17
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	42	20	$28.00	$12.76
71046 X-ray of chest, 2 views	40	39	$66.17	$28.95
94727 Determination of lung volumes using gas dilution or washout	39	32	$100.00	$39.02
94726 Determination of lung volumes using plethysmography	30	26	$100.00	$48.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,815	37	$10.00	$3.38
95165 Professional service for preparation and provision of 1 or more antigens	1,270	12	$16.00	$13.54
95024 Injection of allergenic extracts into skin for immediate reaction analysis	250	15	$11.00	$6.63
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	222	124	$153.00	$117.58
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	201	29	$28.28	$13.06
94200 Test to measure largest amount of air breathed in an out	106	70	$50.00	$12.83
94375 Diagnostic testing in a pulmonary function lab	106	70	$52.00	$34.03
94664 Evaluation of use of breathing device	87	56	$32.00	$14.62
94729 Test to examine how well the lungs exchange gases	83	60	$100.00	$50.27
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	72	72	$207.00	$154.15
94726 Determination of lung volumes using plethysmography	68	53	$100.00	$48.35
71046 X-ray of chest, 2 views	36	34	$67.00	$30.76
94618 Test for exercise-induced lung stress	22	18	$48.00	$31.50
94727 Determination of lung volumes using gas dilution or washout	16	14	$100.00	$39.53
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	15	13	$181.00	$168.06

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,717	37	$10.00	$3.74
95165 Professional service for preparation and provision of 1 or more antigens	1,545	15	$16.00	$14.33
95024 Injection of allergenic extracts into skin for immediate reaction analysis	242	13	$11.00	$7.72
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	221	114	$148.47	$120.51
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	190	19	$28.00	$13.49
94664 Evaluation of use of breathing device	111	65	$32.00	$15.17
94200 Test to measure largest amount of air breathed in an out	105	68	$50.00	$13.88
94375 Diagnostic testing in a pulmonary function lab	105	68	$52.00	$35.40
94729 Test to examine how well the lungs exchange gases	90	66	$100.00	$52.99
94726 Determination of lung volumes using plethysmography	73	56	$100.00	$49.43
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	68	68	$207.00	$161.04
94618 Test for exercise-induced lung stress	50	41	$48.00	$31.44
71046 X-ray of chest, 2 views	42	41	$67.00	$31.68
94727 Determination of lung volumes using gas dilution or washout	17	16	$100.00	$40.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95165 Professional service for preparation and provision of 1 or more antigens	1,567	12	$16.00	$14.62
95004 Test for allergy using allergenic extract	1,423	31	$10.00	$3.80
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	212	113	$147.00	$124.22
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	123	13	$28.68	$13.49
94200 Test to measure largest amount of air breathed in an out	100	67	$50.00	$15.98
94375 Diagnostic testing in a pulmonary function lab	100	67	$52.00	$35.46
94729 Test to examine how well the lungs exchange gases	93	65	$100.00	$53.07
94664 Evaluation of use of breathing device	79	44	$32.00	$14.93
94726 Determination of lung volumes using plethysmography	60	55	$100.00	$49.90
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	58	58	$207.00	$161.09
94618 Test for exercise-induced lung stress	45	38	$48.00	$31.52
71046 X-ray of chest, 2 views	38	36	$67.00	$31.51
94727 Determination of lung volumes using gas dilution or washout	33	25	$100.00	$38.56

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,431	31	$10.00	$3.58
95165 Professional service for preparation and provision of 1 or more antigens	1,312	11	$16.00	$13.41
95024 Injection of allergenic extracts into skin for immediate reaction analysis	215	11	$11.00	$6.87
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	119	62	$181.00	$139.84
95117 Professional service for multiple injections of allergen	119	11	$24.00	$9.61
94200 Test to measure largest amount of air breathed in an out	97	60	$50.00	$20.19
94375 Diagnostic testing in a pulmonary function lab	97	60	$52.00	$36.25
94729 Test to examine how well the lungs exchange gases	91	58	$100.00	$51.40
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	69	$147.00	$101.70
94664 Evaluation of use of breathing device	67	41	$32.00	$15.11
94618 Test for exercise-induced lung stress	51	39	$48.00	$32.43
94727 Determination of lung volumes using gas dilution or washout	47	30	$100.00	$40.50
94726 Determination of lung volumes using plethysmography	44	40	$100.00	$48.70
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	35	35	$261.00	$199.83
71046 X-ray of chest, 2 views	30	27	$67.00	$30.49
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	24	24	$207.00	$142.17
36415 Insertion of needle into vein for collection of blood sample	12	12	$7.00	$3.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	2,822	61	$10.00	$3.74
95024 Injection of allergenic extracts into skin for immediate reaction analysis	440	23	$11.00	$7.25
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	146	86	$181.00	$137.17
94200 Test to measure largest amount of air breathed in an out	136	92	$50.00	$25.11
94375 Diagnostic testing in a pulmonary function lab	136	92	$52.00	$36.78
94729 Test to examine how well the lungs exchange gases	108	87	$100.00	$50.37
94664 Evaluation of use of breathing device	93	52	$32.00	$15.21
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	73	$147.00	$102.41
94618 Test for exercise-induced lung stress	67	59	$71.96	$32.17
94727 Determination of lung volumes using gas dilution or washout	57	47	$100.00	$40.10
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	53	53	$261.00	$194.91
94726 Determination of lung volumes using plethysmography	51	47	$100.00	$49.37
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	50	50	$207.00	$152.69
71046 X-ray of chest, 2 views	49	46	$67.00	$29.06

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,805	42	$10.00	$4.54
95117 Professional service for multiple injections of allergen	169	11	$24.00	$9.01
94375 Diagnostic testing in a pulmonary function lab	120	79	$52.00	$36.32
94200 Test to measure largest amount of air breathed in an out	120	79	$50.00	$24.60
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	99	63	$181.00	$134.37
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	95	77	$147.00	$99.06
94729 Test to examine how well the lungs exchange gases	83	73	$100.00	$49.34
94664 Evaluation of use of breathing device	63	43	$32.00	$15.07
94726 Determination of lung volumes using plethysmography	57	54	$100.00	$49.91
94618 Test for exercise-induced lung stress	55	50	$163.00	$32.02
71046 X-ray of chest, 2 views	54	54	$67.00	$27.69
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	47	47	$261.00	$192.87
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	46	46	$207.00	$153.07
36415 Insertion of needle into vein for collection of blood sample	29	29	$7.00	$2.94
94727 Determination of lung volumes using gas dilution or washout	26	25	$100.00	$40.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
95004 Test for allergy using allergenic extract	1,981	44	$10.00	$5.78
95165 Professional service for preparation and provision of 1 or more antigens	1,175	11	$16.00	$11.54
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	127	77	$181.48	$131.17
94375 Diagnostic testing in a pulmonary function lab	118	76	$52.00	$34.93
94200 Test to measure largest amount of air breathed in an out	118	76	$50.00	$22.33
95117 Professional service for multiple injections of allergen	109	12	$24.00	$8.87
94664 Evaluation of use of breathing device	107	68	$32.00	$15.03
94729 Test to examine how well the lungs exchange gases	79	71	$100.00	$47.45
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	75	63	$146.24	$96.83
94727 Determination of lung volumes using gas dilution or washout	72	64	$100.00	$36.98
94620 Pulmonary exercise testing	58	51	$163.00	$50.23
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	53	53	$261.00	$186.38
71020 X-ray of chest, 2 views, front and side	49	44	$48.14	$18.09
36415 Insertion of needle into vein for collection of blood sample	43	39	$7.00	$2.94
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	38	38	$207.00	$150.37
99497 Advance care planning, first 30 minutes	20	20	$100.00	$76.07
70486 CT scan of face	18	18	$90.00	$38.16
G0008 Administration of influenza virus vaccine	17	17	$29.00	$23.04
90662 Influenza vaccine split virus, preservative free	15	15	$62.00	$48.05

Medical Specialties & State Licenses

Allergy & Immunology Primary Specialty

NUCC Taxonomy Code: 207K00000X

State License AL 27233

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Internal Medicine - Allergy & Immunology

NUCC Taxonomy Code: 207RA0201X

State License AL 27233

An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

213237 (AL)

Medicaid State Provider ID

221413 (AL)

Medicaid State Provider ID

220933 (AL)

Medicaid State Provider ID

9998923 (AL)

Medicaid State Provider ID

212916 (AL)

Commercial Insurance / Payer ID Bcbs

515-41041 (AL)

Commercial Insurance / Payer ID Bcbs

512-05653 (AL)

Commercial Insurance / Payer ID Rr Medicare

P00632093 (AL)

Commercial Insurance / Payer ID Ms Medicaid

02277060 (MS)

Commercial Insurance / Payer ID Bcbs

511-95114 (AL)

Hospital & Practice Group Affiliations

Pulmonary Associates Of Mobile Pc

100 Memorial Hospital Dr, Mobile, AL 366081128

Pulmonary Associates Of Mobile Pc

100 Memorial Hospital Dr, Mobile, AL 366081128

Phone: 2513436848

Pulmonary Associates Of Mobile Pc

5955 Airport Blvd, Mobile, AL 366083135

Phone: 2516330573

Pulmonary Associates Of Mobile Pc

1703 N Bunner St, Foley, AL 365352229

Phone: 2516251370

Secondary Practice Locations

2001 Spring Hill Ave

Mobile, AL 366073326

Phone: 2514333344

5955 Airport Blvd

Mobile, AL 366083135

Phone: 2516330573

100 Memorial Hospital Dr Ste 1a

Mobile, AL 366081128

Phone: 2513436848

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

2 Associated Practitioners

Daniel Gardner , FNP

Nurse Practitioner - Family

NPI 1275913279

Family Nurse Practitioner

Dr. Karen Barker , MD

Allergy & Immunology

NPI 1629268263

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

15 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 28, 2019

Internal Medicine (License #27233 in AL)

📍

Updated Practice Location May 25, 2018

Registered at 8725 COUNTY ROAD 64, DAPHNE, AL 36526 (Tel: 2516251370)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 17, 2018

Internal Medicine (License #27233 in AL)

✅

NPI Profile Active January 13, 2018

NPI status registered as active in NPPES database

📍

Updated Practice Location January 13, 2018

Registered at 8725 COUNTY ROAD 64, DAPHNE, AL 365266061 (Tel: 2516251370)

📍

Updated Business Mailing Address January 13, 2018

Registered at PO BOX 7987, MOBILE, AL 366700987 (Tel: 2516330573)

👤

Provider Name / Credentials Updated January 13, 2018

Recorded as WILLIAM DAVIDSON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 13, 2018

Internal Medicine (License #27233 in AL)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 13, 2018

Allergy & Immunology (License #27233 in AL)

✅

NPI Profile Active December 11, 2009

NPI status registered as active in NPPES database

📍

Updated Practice Location December 11, 2009

Registered at 7101 HIGHWAY 90, SUITE 201, DAPHNE, AL 36526 (Tel: 2516251370)

📍

Updated Business Mailing Address December 11, 2009

Registered at PO BOX 7987, MOBILE, AL 366700987 (Tel: 2516330573)

👤

Provider Name / Credentials Updated December 11, 2009

Recorded as WILLIAM DAVIDSON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 11, 2009

Allergy & Immunology (License #27233 in AL)

🟢

Initial NPI Registration & Enumeration July 19, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1578583191

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: July 19, 2006

Last Update: June 28, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 7987

Mobile, AL 366700987

Phone: 2516330573

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.