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DR. MARLENE MAY MILLEN MD
NPI 1225101355
Internal Medicine in San Diego, CA

Active since November 16, 2006PECOS EnrolledAccepts Medicare Assignment
200 W ARBOR DR DEPT 8201, UCSD MEDICAL CENTER, SAN DIEGO, CA 92103(619) 471-9250(619) 543-3183 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Marlene May Millen Md NPPES

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

DR. MARLENE MAY MILLEN MD (NPI 1225101355) is an individual internal medicine provider in San Diego, California, licensed in California (A82259) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Virginia School Of Medicine (2001).

NPPES Registry Identity

NPI1225101355
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARLENE MAY MILLENCredential: MD
Location Address200 W ARBOR DR DEPT 8201, UCSD MEDICAL CENTERSan Diego, CA 92103-8201
Mailing Address200 W Arbor Dr Dept 8201, Ucsd Medical CenterSan Diego, CA 92103-8201 · (619) 471-9250 · Fax (619) 543-3183
Phone(619) 471-9250
Fax(619) 543-3183
Sole ProprietorNo
Medical School CMSUniversity Of Virginia School Of MedicineGraduated 2001
Enumeration DateNovember 16, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1225101355 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A82259
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
200 W ARBOR DR DEPT 8201, San Diego, CA 92103
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Other Identifiers 3

Medicare UPINI36276CA
Medicare ID-Type UnspecifiedWA68784ACA
Medicaid00A825590CA

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. Marlene May Millen 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 ID8729017512
PECOS Enrollment IDI20050811000666
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 Marlene Millen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Of The University Of California - Ucsd Medical Group
Same address
Gastroenterology
200 W ARBOR DR
San Diego, CA 92103
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Regents Of The University Of California
  • 1,051 clinicians in this Medicare group
NPI 1336267137 (800) 926-8273

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 7

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.
228 services114 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.
79 services79 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.
53 services52 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.
47 services33 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.
36 services36 patients
Influenza vaccine, inactivated 90653
The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.
31 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92103 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
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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 2

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

Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers18 claims18 services$3.90 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier12 claims12 services$215.65 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

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

DR. MAHMOOD F MAFEE MD
Radiology (Diagnostic Radiology)
200 W ARBOR DR DEPT 8201, UCSD MEDICAL CENTER
SAN DIEGO, CA 92103
San Diego County (619) 543-3405

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 Marlene Millen's NPI number?

The NPI number for Marlene Millen is 1225101355. It was assigned to this individual provider in the NPPES registry on November 16, 2006.

Where is Marlene Millen located?

Marlene Millen practices at 200 W Arbor Dr Dept 8201 Ucsd Medical Center, San Diego, CA 92103. The listed phone number is (619) 471-9250.

What is Marlene Millen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marlene Millen enrolled in Medicare?

Yes. Marlene Millen 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 Marlene Millen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marlene Millen reassigns Medicare benefits to Regents Of The University Of California - Ucsd Medical Group (San Diego, CA). 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 Marlene Millen'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 Marlene Millen was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.