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WILLIAM A GREISNER MD
NPI 1720095334
Allergy & Immunology in Lexington, KY

Active since August 03, 2006PECOS EnrolledAccepts Medicare Assignment
171 NORTH EAGLE CREEK DRIVE, SUITE 106, LEXINGTON, KY 40509(859) 277-9112(859) 277-7105 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About William A Greisner Md NPPES

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

WILLIAM A GREISNER MD (NPI 1720095334) is an individual allergy & immunology provider in Lexington, Kentucky, licensed in Kentucky (32610) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Saint Joseph East, and is a graduate of Eastern Virginia Medical School (1991).

NPPES Registry Identity

NPI1720095334
Entity TypeIndividualMale
Primary Taxonomy207K00000X
Provider Legal NameWILLIAM A GREISNERCredential: MD
Location Address171 NORTH EAGLE CREEK DRIVE, SUITE 106Lexington, KY 40509
Mailing Address171 North Eagle Creek Drive, Suite 106Lexington, KY 40509 · (859) 277-9112 · Fax (859) 277-7105
Phone(859) 277-9112
Fax(859) 277-7105
Sole ProprietorNo
Medical School CMSEastern Virginia Medical SchoolGraduated 1991
Enumeration DateAugust 3, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1720095334 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207K00000X
License✔ Licensed in KY · 32610
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.
171 NORTH EAGLE CREEK DRIVE, Lexington, KY 40509
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Other Identifiers 2

Other000000045610KY · Blue Cross Blue Shield
Medicaid64326101KY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter of Tennessee.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William A Greisner Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9032133871
PECOS Enrollment IDI20060120000016
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 Greisner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Allergy & Asthma Associates, P. S. C
0.2 mi
Specialist
171 N EAGLE CREEK DR STE 106
Lexington, KY 40509
  • Reassigned Medicare billing, Kentucky enrollment
  • 3 clinicians in this Medicare group
NPI 1174634455 (859) 277-9112

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.

Professional service for preparation and provision of 1 or more antigens 95165
This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.
1,962 services107 patients
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.
1,687 services22 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.
1,106 services62 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.
140 services82 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
112 services70 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.
38 services27 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Saint Joseph East

Acute Care Hospitals · Lexington, KY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number180143
Location150 North Eagle Creek DriveLexington, KY 40509 · Fayette County
Emergency services Birthing friendly

Referred Medical Equipment & Supplies CMS DME claims 2

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

Injection, immune globulin (hizentra), 100 mg J1559
Treatment-Injections and Infusions (nononcologic) · category RI008N
2 suppliers15 claims4,160 services$9.57 avg. paid by Medicare
Supplies for external non-insulin drug infusion pump, syringe type cartridge, sterile, each K0552
DME-Other DME · category DE000N
2 suppliers15 claims52 services$2.44 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Greisner's NPI number?

The NPI number for William Greisner is 1720095334. It was assigned to this individual provider in the NPPES registry on August 3, 2006.

Where is William Greisner located?

William Greisner practices at 171 North Eagle Creek Drive Suite 106, Lexington, KY 40509. The listed phone number is (859) 277-9112.

What is William Greisner's specialty?

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

Is William Greisner enrolled in Medicare?

Yes. William Greisner is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Greisner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Greisner reassigns Medicare benefits to Allergy & Asthma Associates, P. S. C (Lexington, KY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Greisner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Greisner accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan and Ambetter of Tennessee list William Greisner as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Greisner affiliated with any hospitals?

According to CMS data, William Greisner is affiliated with Saint Joseph East.

When was this NPI record last updated?

The NPPES record for William Greisner was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.