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WILLIAM MARK BARNETT M.D.
NPI 1982990214
Family Medicine in Rolla, MO

Active since June 24, 2011PECOS EnrolledAccepts Medicare Assignment
1605 MARTIN SPRINGS DR STE 210, ROLLA, MO 65401(573) 458-6326(573) 458-6763 Get Directions Write a Review

NPPES record last updated: July 16, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About William Mark Barnett M.d. NPPES

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

WILLIAM MARK BARNETT M.D. (NPI 1982990214) is an individual family medicine provider in Rolla, Missouri, licensed in Missouri (2014011573) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, is affiliated with Phelps County Regional Medical Center, and is a graduate of Other (2011).

NPPES Registry Identity

NPI1982990214
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameWILLIAM MARK BARNETTCredential: M.D.
Location Address1605 MARTIN SPRINGS DR STE 210Rolla, MO 65401-2980
Mailing AddressPo Box 505164Saint Louis, MO 63150-5164 · (417) 820-2000
Phone(573) 458-6326
Fax(573) 458-6763
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateJune 24, 2011
Last NPPES UpdateJuly 16, 2014
✔ NPI 1982990214 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in MO · 2014011573✔ Licensed in MO · 2011018665
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
1605 MARTIN SPRINGS DR STE 210, Rolla, MO 65401
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Other Identifiers 2

MedicaidPENDINGMO
Medicare PINPENDINGMO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.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 Mark Barnett 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 ID648414433
PECOS Enrollment IDI20140731000598
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 Barnett reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mercy Clinic-Springfield Communities
Same address
Rural Health
1605 MARTIN SPRINGS DR STE 210
Rolla, MO 65401
  • Reassigned Medicare billing, Missouri enrollment
  • Also billed through NPI 1245277631 (Missouri)
  • 1,487 clinicians in this Medicare group
NPI 1811028723 (573) 458-6350

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 10

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.
265 services191 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
160 services160 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
62 services62 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
60 services51 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
54 services54 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.
23 services22 patients

Hospital Affiliations CMS Care Compare 3

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

Phelps County Regional Medical Center

Acute Care Hospitals · Rolla, MO
3/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number260017
Location1000 W 10th StRolla, MO 65401 · Phelps County
Emergency services Birthing friendly

Mercy Hospital Lebanon

Acute Care Hospitals · Lebanon, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260059
Location100 Hospital DriveLebanon, MO 65536 · Laclede County
Emergency services Birthing friendly

Mercy Hospital Springfield

Acute Care Hospitals · Springfield, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260065
Location1235 E CherokeeSpringfield, MO 65804 · Greene County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 65401 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
$81.64 typical visit price
range $52.28 – $161.24
Typical copayment $20.41 (range $13.07 – $40.31)
Most-billed visit code 99203
Established Patient
$93.24 typical visit price
range $16.30 – $131.05
Typical copayment $23.31 (range $4.07 – $32.76)
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 11

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers63 claims135 services$6.10 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
8 suppliers19 claims19 services$0.97 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
4 suppliers13 claims13 services$25.04 avg. paid by Medicare
Tubing used with positive airway pressure device A7037
DME-Other DME · category DE001N
4 suppliers14 claims14 services$20.95 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
5 suppliers14 claims84 services$3.00 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
1 supplier13 claims13 services$8.42 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 2

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

KYLA ASHLEY HOBSON FNP
Nurse Practitioner (Family)
1605 MARTIN SPRINGS DR STE 210
ROLLA, MO 65401
Phelps County (573) 458-6350
MERCY CLINIC-SPRINGFIELD COMMUNITIES
Clinic/Center (Rural Health)
1605 MARTIN SPRINGS DR STE 210
ROLLA, MO 65401
Phelps County (573) 458-6350

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 Barnett's NPI number?

The NPI number for William Barnett is 1982990214. It was assigned to this individual provider in the NPPES registry on June 24, 2011.

Where is William Barnett located?

William Barnett practices at 1605 Martin Springs Dr Ste 210, Rolla, MO 65401. The listed phone number is (573) 458-6326.

What is William Barnett's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is William Barnett enrolled in Medicare?

Yes. William Barnett 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 Barnett's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Barnett reassigns Medicare benefits to Mercy Clinic-Springfield Communities (Rolla, MO). 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 Barnett's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Barnett accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 6 other insurers list William Barnett 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 Barnett affiliated with any hospitals?

According to CMS data, William Barnett is affiliated with Phelps County Regional Medical Center, Mercy Hospital Lebanon and Mercy Hospital Springfield.

When was this NPI record last updated?

The NPPES record for William Barnett was last updated on July 16, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.