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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARY LOUIS MANAVALAN M.D.
NPI 1043529803
Internal Medicine in Sunnyvale, CA

Active since September 28, 2010PECOS Enrolled
1002 W FREMONT AVE, SUNNYVALE, CA 94087(408) 739-2383 Get Directions Write a Review

NPPES record last updated: October 29, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Mary Louis Manavalan M.d. NPPES

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

MARY LOUIS MANAVALAN M.D. (NPI 1043529803) is an individual internal medicine provider in Sunnyvale, California, licensed in California (A130919) and active in the NPI registry since September 2010. She is enrolled in Medicare PECOS and maintains a secondary practice location in Fremont.

NPPES Registry Identity

NPI1043529803
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARY LOUIS MANAVALANCredential: M.D.
Location Address1002 W FREMONT AVESunnyvale, CA 94087-3031
Mailing Address1510 4th St 1Berkeley, CA 94710-1717 · (510) 525-8980 · Fax (510) 525-8982
Phone(408) 739-2383
Sole ProprietorYes
Enumeration DateSeptember 28, 2010
Last NPPES UpdateOctober 29, 2026
NPPES CertifiedOctober 29, 2026
✔ NPI 1043529803 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 · A130919
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.
1002 W FREMONT AVE, Sunnyvale, CA 94087
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Secondary Practice Location 1

Location 139400 Paseo Padre PkwyFremont, CA 94538-2310 · Phone (510) 248-3000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Louis Manavalan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

6

Medicare enrollment records show Mary Manavalan reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cs Pacs 3 West LLC
Same address
Hospitalist
1002 W FREMONT AVE
Sunnyvale, CA 94087
  • Reassigned Medicare billing, California enrollment
  • 9 clinicians in this Medicare group
NPI 1073378238 (408) 739-2383
Cs Pacs 3 Ca Medical Group Inc
2.0 mi
Internal Medicine
1949 GRANT RD
Mountain View, CA 94040
  • Reassigned Medicare billing, California enrollment
  • 10 clinicians in this Medicare group
NPI 1922775360 (650) 968-2990
Ca Pacs 2 Medical Group Inc
24 mi
Hospitalist
14766 WASHINGTON AVE
San Leandro, CA 94578
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1801372669 (865) 693-1000
California Post-Acute Medical Group 1, Inc.
31 mi
Hospitalist
508 WESTLINE DR
Alameda, CA 94501
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1265971949 (702) 233-0684
Inpatient Consultants Of California, Inc.
39 mi
Hospitalist
1510 4TH STREET, SUITE 1
Berkely, CA 94710
  • Reassigned Medicare billing, California enrollment
  • 35 clinicians in this Medicare group
NPI 1831134253 (510) 525-8980
Quantum Healthcare Medical Associates Inc.
348 mi
Hospitalist
400 N PEPPER AVE
Colton, CA 92324
  • Reassigned Medicare billing, California enrollment
  • 338 clinicians in this Medicare group
NPI 1568490597 (909) 580-1000

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 8

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 nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
499 services32 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
162 services18 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
65 services19 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
48 services16 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
48 services19 patients
Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306
An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.
28 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94087 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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 4

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

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034
Other-Enteral and Parenteral · category OB006N
1 supplier13 claims392 services$2.40 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier23 claims660 services$4.32 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
1 supplier26 claims15,763 services$0.26 avg. paid by Medicare
Iv pole E0776
DME-Other DME · category DE000N
1 supplier20 claims20 services$4.36 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 11

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

HEATHER BROCKETT OTR/L
Occupational Therapist
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (831) 331-9625
CS PACS 3 WEST LLC
Hospitalist
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
KAYOKO JACKIE NAKAMURA NP
Nurse Practitioner (Gerontology)
1002 W FREMONT AVE, IDYLWOOD CARE CENTER
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
RACHEL SHERIFF
Speech-Language Pathologist
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
GABRIELLE ANNE FRANCISCO RAMOS
Speech-Language Pathologist
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
ALEX AGPASA
Physical Therapist (Geriatrics)
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
CRESTWOOD BEHAVIORAL HEALTH, INC.
Skilled Nursing Facility
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (408) 739-2383
TORI HENINGER
Speech-Language Pathologist
1002 W FREMONT AVE
SUNNYVALE, CA 94087
Santa Clara County (805) 558-1913

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 Mary Manavalan's NPI number?

The NPI number for Mary Manavalan is 1043529803. It was assigned to this individual provider in the NPPES registry on September 28, 2010.

Where is Mary Manavalan located?

Mary Manavalan practices at 1002 W Fremont Ave, Sunnyvale, CA 94087. The listed phone number is (408) 739-2383.

What is Mary Manavalan's specialty?

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

Is Mary Manavalan enrolled in Medicare?

Yes. Mary Manavalan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mary Manavalan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Manavalan reassigns Medicare benefits to 6 organizations: Cs Pacs 3 West LLC (Sunnyvale, CA), Cs Pacs 3 Ca Medical Group Inc (Mountain View, CA), Ca Pacs 2 Medical Group Inc (San Leandro, CA), California Post-Acute Medical Group 1, Inc. (Alameda, CA), Inpatient Consultants Of California, Inc. (Berkely, CA) and 1 more organization, 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 Mary Manavalan'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 Mary Manavalan was last updated on October 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.