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MOHAMAD-AMMAR F AYASS M.D.
NPI 1821036559
Internal Medicine - Pulmonary Disease in San Angelo, TX

Active since June 03, 2006PECOS EnrolledAccepts Medicare Assignment
3021 GREEN MEADOW DR, SAN ANGELO, TX 76904(325) 223-1800(325) 223-1810 Get Directions Write a Review

NPPES record last updated: November 17, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mohamad-ammar F Ayass M.d. NPPES

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

MOHAMAD-AMMAR F AYASS M.D. (NPI 1821036559) is an individual pulmonary disease provider in San Angelo, Texas, licensed in Texas (L2116) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Shannon Medical Center, and is a graduate of Other (1988).

NPPES Registry Identity

NPI1821036559
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameMOHAMAD-AMMAR F AYASSCredential: M.D.
Location Address3021 GREEN MEADOW DRSan Angelo, TX 76904-6975
Mailing Address8501 Wade Blvd Ste 750Frisco, TX 75034-6437 · (972) 668-6005 · Fax (972) 635-4440
Phone(325) 223-1800
Fax(325) 223-1810
Sole ProprietorYes
Medical School CMSOtherGraduated 1988
Enumeration DateJune 3, 2006
Last NPPES UpdateNovember 17, 2025
NPPES CertifiedNovember 17, 2025
✔ NPI 1821036559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in TX · L2116
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
3021 GREEN MEADOW DR, San Angelo, TX 76904
Open in Google Maps ↗

Other Identifiers 4

Medicaid145403503TX
Medicaid168067001TX
Other0027LWTX · Bcbs Group #
Other8P5490TX · Bc/bs Pin

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mohamad-ammar F Ayass M.d. 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 ID3971575747
PECOS Enrollment IDI20040811000989
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.

Areas of Expertise CMS Part B claims

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.

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.
89 services63 patients

Hospital Affiliations CMS Care Compare 3

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

Shannon Medical Center

Acute Care Hospitals · San Angelo, TX
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450571
Location120 E Harris Ave.San Angelo, TX 76903 · Tom Green County
Emergency services Birthing friendly

Hendrick Medical Center Brownwood

Acute Care Hospitals · Brownwood, TX
1/5 CMS rating
OwnershipProprietary
CMS Certification Number450587
Location1501 Burnet DrBrownwood, TX 76801 · Brown County
Emergency services Birthing friendly

Medical City Plano

Acute Care Hospitals · Plano, TX
3/5 CMS rating
OwnershipProprietary
CMS Certification Number450651
Location3901 W 15th StPlano, TX 75075 · Collin County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 76904 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 9

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

Pillow for use on nasal cannula type interface, replacement only, pair A7033
DME-Other DME · category DE001N
6 suppliers18 claims108 services$14.76 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
6 suppliers22 claims22 services$56.02 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
4 suppliers12 claims12 services$16.73 avg. paid by Medicare
Tubing used with positive airway pressure device A7037
DME-Other DME · category DE001N
5 suppliers20 claims20 services$14.42 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
6 suppliers27 claims158 services$2.26 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
5 suppliers34 claims34 services$15.70 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 Mohamad-ammar Ayass's NPI number?

The NPI number for Mohamad-ammar Ayass is 1821036559. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Where is Mohamad-ammar Ayass located?

Mohamad-ammar Ayass practices at 3021 Green Meadow Dr, San Angelo, TX 76904. The listed phone number is (325) 223-1800.

What is Mohamad-ammar Ayass's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Mohamad-ammar Ayass enrolled in Medicare?

Yes. Mohamad-ammar Ayass 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.

What insurance does Mohamad-ammar Ayass accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list Mohamad-ammar Ayass 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 Mohamad-ammar Ayass affiliated with any hospitals?

According to CMS data, Mohamad-ammar Ayass is affiliated with Shannon Medical Center, Hendrick Medical Center Brownwood and Medical City Plano.

When was this NPI record last updated?

The NPPES record for Mohamad-ammar Ayass was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.