1. Home
  2. Directory
  3. Arizona
  4. Mesa
  5. Dentist
  6. NPI Profile

DR. WILLIAM SHAWN MONAHAN D.M.D
NPI 1407293541
Dentist in Mesa, AZ

Active since May 30, 2013PECOS Enrolled
4540 E BASELINE RD STE 110, MESA, AZ 85206(480) 764-2111 Get Directions Write a Review

NPPES record last updated: September 16, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 16, 2025, Jul 5, 2021 (2 updates tracked since 2021).

About Dr. William Shawn Monahan D.m.d NPPES

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

DR. WILLIAM SHAWN MONAHAN D.M.D (NPI 1407293541) is an individual dentist in Mesa, Arizona, licensed in Arizona (D008339) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407293541
Entity TypeIndividualMale
Primary Taxonomy122300000X
Provider Legal NameDR. WILLIAM SHAWN MONAHANCredential: D.M.D
Location Address4540 E BASELINE RD STE 110Mesa, AZ 85206-4616
Mailing Address4540 E Baseline Rd Ste 110Mesa, AZ 85206-4616 · (480) 764-2111
Phone(480) 764-2111
Sole ProprietorNo
Enumeration DateMay 30, 2013
Last NPPES UpdateSeptember 16, 20252 updates tracked since enumeration
NPPES CertifiedSeptember 16, 2025
✔ NPI 1407293541 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in AZ · D008339
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
4540 E BASELINE RD STE 110, Mesa, AZ 85206
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas 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 (PECOS)

Dr. William Shawn Monahan D.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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85206 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
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$69.24 typical visit price
range $17.72 – $137.41
Typical copayment $17.31 (range $4.43 – $34.35)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Monahan's NPI number?

The NPI number for William Monahan is 1407293541. It was assigned to this individual provider in the NPPES registry on May 30, 2013.

Where is William Monahan located?

William Monahan practices at 4540 E Baseline Rd Ste 110, Mesa, AZ 85206. The listed phone number is (480) 764-2111.

What is William Monahan's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is William Monahan enrolled in Medicare?

Yes. William Monahan is registered in the Medicare PECOS enrollment system.

What insurance does William Monahan accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Humana list William Monahan 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.

When was this NPI record last updated?

The NPPES record for William Monahan was last updated on September 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.