WILLIAM A NISH M.D.
NPI 1821097643
Allergy & Immunology in Gainesville, GA

Q: What is William Nish's NPI number?

The NPI number for William Nish is 1821097643. It was assigned to this individual provider in the NPPES registry on July 14, 2005.

Q: What is William Nish's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for William Nish was last updated on October 7, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 14, 2005PECOS Enrolled

82.55/100

CMS Quality Rating

2510 LIMESTONE PKWY, GAINESVILLE, GA 30501(770) 534-9933(770) 534-8999 Get Directions Write a Review

NPPES record last updated: October 7, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 7, 2020, Apr 16, 2020, Feb 7, 2019 and 1 more (4 updates tracked since 2015).

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About William A Nish M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM A NISH M.D. (NPI 1821097643) is an individual allergy & immunology provider in Gainesville, Georgia, licensed in Georgia (031804) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and maintains a secondary practice location in Braselton.

NPPES Registry Identity

NPI1821097643

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameWILLIAM A NISHCredential: M.D.

Location Address2510 LIMESTONE PKWYGainesville, GA 30501-2089

Mailing AddressPo Box 742616Atlanta, GA 30374-2616 · (770) 219-8420

Phone(770) 534-9933

Fax(770) 534-8999

Sole ProprietorYes

Enumeration DateJuly 14, 2005

Last NPPES UpdateOctober 7, 20204 updates tracked since enumeration

NPPES CertifiedOctober 7, 2020

✔ NPI 1821097643 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in GA · 031804

Definition

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.

Also ListedAllergy & Immunology · AllergyTaxonomy 207KA0200X · License 031804 (GA)

Also ListedInternal Medicine · Allergy & ImmunologyTaxonomy 207RA0201X · License 03180 (GA)

2510 LIMESTONE PKWY, Gainesville, GA 30501

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Secondary Practice Location 1

Location 11515 River Pl Ste 380Braselton, GA 30517-5605 · Phone (770) 848-9345

Other Identifiers 1

Medicaid00606559EGA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William A Nish M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Nish reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Northeast Georgia Physicians Group Inc

2.0 mi

Family Medicine

743 SPRING ST NE
Gainesville, GA 30501

Reassigned Medicare billing, Georgia enrollment
1,172 clinicians in this Medicare group

NPI 1891745212 (770) 219-9000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

1,795 services54 patients

Test for allergy using allergenic extract injected into skin 95024

An allergy skin test involves injecting a small amount of allergenic extract into your skin. This test helps determine if you're allergic to specific substances. If allergic, a small red bump appears at the test site. It's safe and quick.

388 services46 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

199 services30 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

195 services108 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

182 services101 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

72 services72 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

82.55/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

81.14

Promoting Interoperability

100

Improvement Activities

Cost

60.7

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

1 supplier25 claims25 services$6.27 avg. paid by Medicare

Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg J1569

Treatment-Injections and Infusions (nononcologic) · category RI008N

1 supplier15 claims1,050 services$35.56 avg. paid by Medicare

Services, supplies and accessories used in the home under the medicare intravenous immune globulin (ivig) demonstration Q2052

Treatment-Chemotherapy · category RH012N

1 supplier15 claims15 services$309.61 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALLERGY & ASTHMA CARE CENTER, LLC

Specialist