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DR. MASON JAMES WALGRAVE M.D.
NPI 1144670662
Hospitalist in Charleston, SC

Active since June 15, 2016PECOS EnrolledAccepts Medicare Assignment
169 ASHLEY AVE, ROOM 202 MAIN HOSPITAL MSC333, CHARLESTON, SC 29425(843) 792-0435 Get Directions Write a Review

NPPES record last updated: October 29, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 19, 2024, Oct 27, 2020, Jun 15, 2016 (3 updates tracked since 2016).

About Dr. Mason James Walgrave M.d. NPPES

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

DR. MASON JAMES WALGRAVE M.D. (NPI 1144670662) is an individual hospitalist provider in Charleston, South Carolina, licensed in South Carolina (39795) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS, is affiliated with Musc Medical Center, and maintains a secondary practice location in Charleston.

NPPES Registry Identity

NPI1144670662
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameDR. MASON JAMES WALGRAVECredential: M.D.
Location Address169 ASHLEY AVE, ROOM 202 MAIN HOSPITAL MSC333Charleston, SC 29425-8905
Mailing AddressPo Box 751461Charlotte, NC 28275-1461 · (843) 792-6200
Phone(843) 792-0435
Sole ProprietorNo
Medical School CMSUniversity Of North Texas Hsc, College Of Osteopathic MedGraduated 2016
Enumeration DateJune 15, 2016
Last NPPES UpdateOctober 29, 20253 updates tracked since enumeration
NPPES CertifiedOctober 29, 2025
✔ NPI 1144670662 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in SC · 39795
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 39795 (SC)
Also ListedPediatricsTaxonomy 208000000X · License 39795 (SC)
169 ASHLEY AVE, Charleston, SC 29425
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Secondary Practice Location 1

Location 12095 Henry Tecklenburg DrCharleston, SC 29414-5733 · Phone (843) 402-1634 · Fax (843) 402-1550

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter of North Carolina, BlueCross BlueShield of South Carolina 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

Dr. Mason James Walgrave 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 ID1153605704
PECOS Enrollment IDI20200630000207
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 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
122 services44 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
56 services23 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
55 services55 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
18 services18 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

Musc Medical Center

Acute Care Hospitals · Charleston, SC
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number420004
Location169 Ashley AveCharleston, SC 29425 · Charleston County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29425 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
$124.04 typical visit price
range $53.57 – $163.84
Typical copayment $31.01 (range $13.39 – $40.96)
Most-billed visit code 99204
Established Patient
$95.12 typical visit price
range $16.96 – $133.52
Typical copayment $23.78 (range $4.24 – $33.38)
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.

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.

MR. BRUCE ALAN REEVES PT
Physical Therapist (Orthopedic)
169 ASHLEY AVE, ROOM, 3SW WING
CHARLESTON, SC 29425
Charleston County (843) 792-3481
KRISTINA CALAMIA
Health and Wellness Coach
169 ASHLEY AVE
CHARLESTON, SC 29425
Charleston County (843) 792-3881
EMILY MCGILL MD
Anesthesiology
169 ASHLEY AVE
CHARLESTON, SC 29425
Charleston County (843) 792-2185
PAIGE WOODHAM M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
169 ASHLEY AVE, ROOM 202 MAIN HOSPITAL MSC333
CHARLESTON, SC 29425
Charleston County (843) 792-1086
KATIE FLOWER M.D.
Surgery
169 ASHLEY AVE, ROOM 202 MAIN HOSPITAL
CHARLESTON, SC 29425
Charleston County (216) 385-5459
JENNIE HYEJIN KWON MD
Surgery
169 ASHLEY AVE
CHARLESTON, SC 29425
Charleston County (843) 792-3072
DR. BRIAN ELLIS JACOBS MD
Surgery
169 ASHLEY AVE
CHARLESTON, SC 29425
Charleston County (843) 792-1414
HANNAH ELIZABETH PRESSLER
Internal Medicine
169 ASHLEY AVE
CHARLESTON, SC 29425
Charleston County (843) 754-7275

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 Mason Walgrave's NPI number?

The NPI number for Mason Walgrave is 1144670662. It was assigned to this individual provider in the NPPES registry on June 15, 2016.

Where is Mason Walgrave located?

Mason Walgrave practices at 169 Ashley Ave Room 202 Main Hospital Msc333, Charleston, SC 29425. The listed phone number is (843) 792-0435.

What is Mason Walgrave's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Mason Walgrave enrolled in Medicare?

Yes. Mason Walgrave 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 Mason Walgrave accept?

Health plans from Ambetter from Absolute Total Care, Ambetter of North Carolina, BlueCross BlueShield of South Carolina, First Choice Next and Molina Healthcare list Mason Walgrave 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 Mason Walgrave affiliated with any hospitals?

According to CMS data, Mason Walgrave is affiliated with Musc Medical Center.

When was this NPI record last updated?

The NPPES record for Mason Walgrave was last updated on October 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.