What is Barry Zeffren's NPI number?

Barry Zeffren's National Provider Identifier (NPI) is 1205908639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Barry Zeffren's specialty?

Barry Zeffren is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).

Where is Barry Zeffren located?

Barry Zeffren's practice location on file with NPPES is 4 Country Club Executive Park, Glen Carbon, IL 62034.

What is Barry Zeffren's phone number?

The practice phone number listed in the NPPES registry for Barry Zeffren is (618) 288-6673.

Does Barry Zeffren accept Medicare?

Barry Zeffren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Barry Zeffren's NPI active?

Yes — Barry Zeffren's NPI (1205908639) is active in the NPPES registry as of the last update on 2015-04-10.

IndividualActiveAccepts Medicare

Barry Zeffren, MD

NPI 1205908639 · Allergy & Immunology Physician · Glen Carbon, IL

Barry Zeffren, MD is a Allergy & Immunology Physician provider in Glen Carbon, IL (NPI 1205908639).

Provider details

NPI number: 1205908639
Entity type: Individual
Primary specialty: Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 036068207 (IL)

Practice location

4 Country Club Executive Park

Glen Carbon, IL 62034

Phone: (618) 288-6673

Fax: (618) 288-1938

Approximate (ZIP-level) locationGet directions

More IL providers

Mailing address

4 Country Club Executive Park

Glen Carbon, IL 62034

Specialties & taxonomies

Allergy & Immunology PhysicianPrimary207K00000XLicense 036068207 (IL)
Allopathic & Osteopathic Physicians
Allergy & Immunology Physician207K00000XLicense R8A32 (MO)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(76/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
19 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
2,741 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Test for Allergy Using Allergenic Extract95004	1,512	$4
Test for Allergy Using Skin Patch95044	1,003	$5
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	156	$88
New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205	49	$217
Test to Measure Expiratory Airflow and Volume94010	21	$26

Typical Medicare-allowed amounts for these services range $4–$217 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Fluticasone Propionate	122	41
Fluticasone/Vilanterolbrand: Breo Ellipta	116	23
Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta	101	17
Albuterol Sulfatebrand: Albuterol Sulfate Hfa	88	35
Omalizumabbrand: Xolair	57	—
Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol	54	17

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$611 across 34 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2006-11-14
Last updated: 2015-04-10

Frequently asked questions

What is Barry Zeffren's NPI number?: Barry Zeffren's National Provider Identifier (NPI) is 1205908639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Barry Zeffren's specialty?: Barry Zeffren is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
Where is Barry Zeffren located?: Barry Zeffren's practice location on file with NPPES is 4 Country Club Executive Park, Glen Carbon, IL 62034.
What is Barry Zeffren's phone number?: The practice phone number listed in the NPPES registry for Barry Zeffren is (618) 288-6673.
Does Barry Zeffren accept Medicare?: Barry Zeffren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Barry Zeffren's NPI active?: Yes — Barry Zeffren's NPI (1205908639) is active in the NPPES registry as of the last update on 2015-04-10.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Test for Allergy Using Allergenic Extract95004	1,512	$4
Test for Allergy Using Skin Patch95044	1,003	$5
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	156	$88
New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205	49	$217
Test to Measure Expiratory Airflow and Volume94010	21	$26

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Fluticasone Propionate	122	41
Fluticasone/Vilanterolbrand: Breo Ellipta	116	23
Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta	101	17
Albuterol Sulfatebrand: Albuterol Sulfate Hfa	88	35
Omalizumabbrand: Xolair	57	—
Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol	54	17

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$611 across 34 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments