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DR. PETER NISSEN CHALMERS MD
NPI 1518288323
Orthopaedic Surgery in Saint Louis, MO

Active since June 15, 2010PECOS EnrolledAccepts Medicare Assignment
92.06/100
CMS Quality Rating
4921 PARKVIEW PL, STE 6A/6B/12A, SAINT LOUIS, MO 63110(314) 514-3500(314) 747-2598 Get Directions Write a Review

NPPES record last updated: November 11, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 11, 2021, Oct 1, 2015 (2 updates tracked since 2015).

About Dr. Peter Nissen Chalmers Md NPPES

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

DR. PETER NISSEN CHALMERS MD (NPI 1518288323) is an individual orthopaedic surgery provider in Saint Louis, Missouri, licensed in Missouri (2015005950) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with University Of Utah Hospitals And Clinics, and is a graduate of University Of Missouri, Columbia School Of Medicine (2010).

NPPES Registry Identity

NPI1518288323
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameDR. PETER NISSEN CHALMERSCredential: MD
Location Address4921 PARKVIEW PL, STE 6A/6B/12ASaint Louis, MO 63110-1032
Mailing Address660 S Euclid Ave, C B 8233Saint Louis, MO 63110-1010 · (314) 514-3500 · Fax (314) 747-2598
Phone(314) 514-3500
Fax(314) 747-2598
Sole ProprietorNo
Medical School CMSUniversity Of Missouri, Columbia School Of MedicineGraduated 2010
Enumeration DateJune 15, 2010
Last NPPES UpdateNovember 11, 20212 updates tracked since enumeration
NPPES CertifiedNovember 11, 2021
✔ NPI 1518288323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in MO · 2015005950
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
4921 PARKVIEW PL, Saint Louis, MO 63110
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Wyoming, BridgeSpan Health Company, Molina Healthcare 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

Dr. Peter Nissen Chalmers 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 ID4880909597
PECOS Enrollment IDI20160824002538
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 Reassignments

2

Medicare enrollment records show Peter Chalmers reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Utah Adult Services
1,147 mi
Orthopaedic Surgery
9385 S SNOWBIRD CENTER DR
Sandy, UT 84092
  • Reassigned Medicare billing, Utah enrollment
  • 2,620 clinicians in this Medicare group
NPI 1851904247 (801) 587-7109
University Of Utah Pediatric Services
1,147 mi
Pediatric Orthopaedic Surgery
9385 S SNOWBIRD CENTER DR
Sandy, UT 84092
  • Reassigned Medicare billing, Utah enrollment
  • 751 clinicians in this Medicare group
NPI 1386257152 (801) 587-7109

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 11

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.
75 services59 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.
57 services43 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.
41 services32 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
39 services39 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
31 services31 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.
31 services27 patients

Hospital Affiliations CMS Care Compare

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

University Of Utah Hospitals And Clinics

Acute Care Hospitals · Salt Lake City, UT
5/5 CMS rating
OwnershipGovernment - State
CMS Certification Number460009
Location50 North Medical DriveSalt Lake City, UT 84132 · Salt Lake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

92.06/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality85.57
Promoting Interoperability100
Improvement Activities40

Referred Medical Equipment & Supplies CMS DME claims

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

Shoulder orthosis, acromio/clavicular (canvas and webbing type), prefabricated, off-the-shelf L3670
DME-Orthotic Devices · category DF000N
2 suppliers29 claims29 services$86.57 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 20

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

DR. CHARLES PHILLIPS JONES MD
Urology
4921 PARKVIEW PL, DIV SURG UROLOGY, STE 11C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-8200
DR. PRABHA RANGANATHAN MD
Internal Medicine (Rheumatology)
4921 PARKVIEW PL, DIV IM RHEUMATOLOGY, STE 5C
SAINT LOUIS, MO 63110
St. Louis City (314) 286-2635
DR. RALPH GERARD DACEY JR. MD
Neurological Surgery
4921 PARKVIEW PL, DEPT NEUROLOGICAL SURGERY, STE 6B/6C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-3577
DR. KRASIMIRA MIKHAILOVA MIKHOVA MD
Internal Medicine (Clinical Cardiac Electrophysiology)
4921 PARKVIEW PL, DIV IM CARDIOLOGY, STE 8B
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1291
DR. JEE YOUNG HAN MD
Psychiatry & Neurology (Neurology)
4921 PARKVIEW PL, DIV NEUROLOGY AGING AND DEMENTIA, STE 6C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1408
MS. MAREN JORGENSEN OT
Occupational Therapist
4921 PARKVIEW PL, DEPT OCCUPATIONAL THERAPY, STE 6F
SAINT LOUIS, MO 63110
St. Louis City (314) 286-1669
DR. ADRIAN SHIFREN MD
Internal Medicine (Pulmonary Disease)
4921 PARKVIEW PL, DIV IM PULMONARY AND CCM, 8TH FL
SAINT LOUIS, MO 63110
St. Louis City (314) 454-8917
DR. MYRA L RUBIO MD
Internal Medicine
4921 PARKVIEW PL, STE 5A
SAINT LOUIS, MO 63110
St. Louis City (314) 747-5900

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 Peter Chalmers's NPI number?

The NPI number for Peter Chalmers is 1518288323. It was assigned to this individual provider in the NPPES registry on June 15, 2010.

Where is Peter Chalmers located?

Peter Chalmers practices at 4921 Parkview Pl Ste 6a/6b/12a, Saint Louis, MO 63110. The listed phone number is (314) 514-3500.

What is Peter Chalmers's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Peter Chalmers enrolled in Medicare?

Yes. Peter Chalmers 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 organizations bill Medicare for Peter Chalmers's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Peter Chalmers reassigns Medicare benefits to 2 organizations: University Of Utah Adult Services (Sandy, UT) and University Of Utah Pediatric Services (Sandy, UT). Each 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 Peter Chalmers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Peter Chalmers accept?

Health plans from Blue Cross Blue Shield of Wyoming, BridgeSpan Health Company, Molina Healthcare, Regence BlueCross BlueShield of Utah and Select Health and 1 other insurer list Peter Chalmers 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 Peter Chalmers affiliated with any hospitals?

According to CMS data, Peter Chalmers is affiliated with University Of Utah Hospitals And Clinics.

When was this NPI record last updated?

The NPPES record for Peter Chalmers was last updated on November 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.