ALEX PENN
NPI 1972881159
Radiology - Diagnostic Radiology in Walnut Creek, CA

Active since July 22, 2011PECOS EnrolledAccepts Medicare Assignment
90.81/100
CMS Quality Rating
2125 OAK GROVE RD STE 200, WALNUT CREEK, CA 94598(925) 296-7150 Get Directions Write a Review

NPPES record last updated: June 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 18, 2025, Dec 12, 2023, Apr 26, 2019 (3 updates tracked since 2019).

About Alex Penn NPPES

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

ALEX PENN (NPI 1972881159) is an individual diagnostic radiology provider in Walnut Creek, California, licensed in California (A122596) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2011).

NPPES Registry Identity

NPI1972881159
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameALEX PENN
Location Address2125 OAK GROVE RD STE 200Walnut Creek, CA 94598-2520
Mailing Address2125 Oak Grove Rd Ste 200Walnut Creek, CA 94598-2520
Sole ProprietorYes
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2011
Enumeration DateJuly 22, 2011
Last NPPES UpdateJune 18, 20253 updates tracked since enumeration
NPPES CertifiedJune 18, 2025
✔ NPI 1972881159 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in CA · A122596
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedRadiology · Vascular & Interventional RadiologyTaxonomy 2085R0204X · License A122596 (CA)
2125 OAK GROVE RD STE 200, Walnut Creek, CA 94598

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

Alex Penn 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 ID8820385693
PECOS Enrollment IDI20170523000138, I20240410003025
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

9

Medicare enrollment records show Alex Penn reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Diagnostic Radiology
2125 OAK GROVE RD STE 200
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California and Hawaii enrollments
  • 181 clinicians in this Medicare group
Diagnostic Radiology
1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California and Hawaii enrollments
  • 129 clinicians in this Medicare group
Diagnostic Radiology
5730 TELEGRAPH AVE
Oakland, CA 94609
  • Reassigned Medicare billing, California and Hawaii enrollments
  • 158 clinicians in this Medicare group
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
Diagnostic Radiology
4500 BUSINESS CENTER DR
Fairfield, CA 94534
  • Reassigned Medicare billing, California enrollment
  • 88 clinicians in this Medicare group
General Acute Care Hospital
1200 B GALE WILSON BLVD
Fairfield, CA 94533
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Northbay Physicians Surgery Center, LLC
  • 516 clinicians in this Medicare group
Clinic/Center
2741 MIDDLEFIELD RD
Palo Alto, CA 94306
General Acute Care Hospital
67-1125 MAMALAHOA HWY
Kamuela, HI 96743
  • Reassigned Medicare billing, California enrollment
  • 47 clinicians in this Medicare group
Multi-Specialty
1301 PUNCHBOWL ST
Honolulu, HI 96813
  • Reassigned Medicare billing, California enrollment
  • 48 clinicians in this Medicare group

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 70

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.

X-ray of chest, 1 view 71045
A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.
987 services861 patients
Ct scan head or brain without contrast 70450
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
345 services340 patients
Ct scan of abdomen and pelvis with contrast 74177
A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.
167 services164 patients
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152
This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.
142 services131 patients
Ct scan of chest without contrast 71250
A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.
110 services110 patients
Ct scan of abdomen and pelvis without contrast 74176
A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.
100 services97 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

90.81/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality85.12
Improvement Activities40

Other Providers at the Same Location NPPES 14

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

Radiology (Diagnostic Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Neuroradiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Diagnostic Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Vascular & Interventional Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Diagnostic Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Body Imaging)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Diagnostic Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598
Radiology (Diagnostic Radiology)
2125 OAK GROVE RD STE 200
WALNUT CREEK, CA 94598

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 Alex Penn's NPI number?

The NPI number for Alex Penn is 1972881159. It was assigned to this individual provider in the NPPES registry on July 22, 2011.

Where is Alex Penn located?

Alex Penn practices at 2125 Oak Grove Rd Ste 200, Walnut Creek, CA 94598. The listed phone number is (925) 296-7150.

What is Alex Penn's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Alex Penn enrolled in Medicare?

Yes. Alex Penn 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 Alex Penn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alex Penn reassigns Medicare benefits to 9 organizations: Bay Imaging Consultants Medical Group Inc (Walnut Creek, CA), John Muir Magnetic Imaging Center (Walnut Creek, CA), Magnetic Imaging Affiliates, LLC (Oakland, CA), Permanente Medical Group Inc (Vallejo, CA), Solano Diagnostics Partners, A Calif Limited Partnership (Fairfield, CA) and 4 more organizations, listed in the Medicare section above. 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 Alex Penn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alex Penn was last updated on June 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.