PETER ALLEN LINFOOT PH.D., M.D.
NPI 1396777264
Internal Medicine - Endocrinology, Diabetes & Metabolism in Long Beach, CA

Active since July 07, 2006PECOS EnrolledAccepts Medicare Assignment
2699 ATLANTIC AVE, LONG BEACH, CA 90806(562) 426-3333(562) 424-0837 Get Directions Write a Review

NPPES record last updated: December 30, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Dec 30, 2025, Mar 4, 2025, Jul 21, 2022 and 2 more (5 updates tracked since 2017).

  • Individual
  • Male
  • Years of Experience 37
  • Internal Medicine
  • Endocrinology, Diabetes & Metabolism
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About PETER LINFOOT

This page provides the complete NPI Profile along with additional information for Peter Linfoot, an internist established in Long Beach, California with a medical specialization in Internal Medicine, focusing in endocrinology, diabetes & metabolism and more than 37 years of experience. He graduated from Icahn School Of Medicine At Mount Sinai in 1990. The healthcare provider is registered in the NPI registry with number 1396777264 assigned on July 2006. The practitioner's primary taxonomy code is 207RE0101X with license number G071944 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1396777264
Provider Name
PETER ALLEN LINFOOT PH.D., M.D.
Gender
Male
Entity Type
Individual
Location Address
2699 ATLANTIC AVE LONG BEACH, CA 90806
Location Phone
(562) 426-3333
Location Fax
(562) 424-0837
Mailing Address
PO BOX 35380 LAS VEGAS, NV 89133
Mailing Phone
(702) 579-3203
Medical School Name
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduation Year
1990
Is Sole Proprietor?
No
Enumeration Date
07-07-2006
Last Update Date
12-30-2025
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An internist like Peter Linfoot is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Secondary Locations

  • 55 W Tietan St
    Walla Walla, WA 99362
    (509) 525-3720

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine Endocrinology, Diabetes & Metabolism

Taxonomy Code
207RE0101X
Type
Allopathic & Osteopathic Physicians
License No.
G071944
License State
CA
Taxonomy Description
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

Medicare Participation & PECOS Enrollment Status

Peter Linfoot is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Peter Linfoot is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 5991794810

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20040506001717, I20170825002761

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Other DME (DE017N)

    Supplies for maintenance of insulin infusion catheter, per week (HCPCS:A4224)

    9 DME suppliers used 89 Medicare Claims 1053 Services Paid

  • DME-Other DME (DE017N)

    Supplies for external insulin infusion pump, syringe type cartridge, sterile, each (HCPCS:A4225)

    8 DME suppliers used 86 Medicare Claims 2655 Services Paid

  • DME-Other DME (DE017N)

    Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips (HCPCS:A4253)

    19 DME suppliers used 119 Medicare Claims 444 Services Paid

  • DME-Medical/Surgical Supplies (DA000N)

    Lancets, per box of 100 (HCPCS:A4259)

    9 DME suppliers used 28 Medicare Claims 52 Services Paid

  • DME-Other DME (DE017N)

    External ambulatory infusion pump, insulin (HCPCS:E0784)

    6 DME suppliers used 30 Medicare Claims 30 Services Paid

  • DME-Other DME (DE017N)

    Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service (HCPCS:K0553)

    18 DME suppliers used 646 Medicare Claims 646 Services Paid

  • DME-Other DME (DE017N)

    Receiver (monitor), dedicated, for use with therapeutic glucose continuous monitor system (HCPCS:K0554)

    7 DME suppliers used 14 Medicare Claims 14 Services Paid

Unknown

  • Treatment-Injections and Infusions (nononcologic) (RI000N)

    Insulin for administration through dme (i.e., insulin pump) per 50 units (HCPCS:J1817)

    14 DME suppliers used 65 Medicare Claims 6100 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Blood glucose (sugar) test performed by hand-held instrument

A blood glucose test uses a handheld device to measure the amount of sugar in your blood. A small prick on your finger allows a drop of blood to be placed on a test strip, which is then read by the device. This helps monitor and manage diabetes effectively.

This service was performed 314 times for 175 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report

This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.

This service was performed 171 times for 95 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with provider supplied equipment

This process involves a tiny sensor placed under your skin that checks your blood sugar levels in tissue fluid regularly. The sensor sends these readings to a device, allowing you to track your levels in real-time. This is provided by your healthcare provider.

This service was performed 18 times for 15 patients

Dxa bone density measurement of hip, pelvis, spine

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

This service was performed 66 times for 66 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more

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.

This service was performed 119 times for 108 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more

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.

This service was performed 559 times for 365 patients

Hemoglobin a1c level

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

This service was performed 278 times for 162 patients

Injection of drug or substance under skin or into muscle

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

This service was performed 185 times for 83 patients

Injection, denosumab, 1 mg

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

This service was performed 5,820 times for 71 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more

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.

This service was performed 42 times for 42 patients

Professional service for multiple injections of allergen

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

This service was performed 48 times for 14 patients

Telephone medical discussion with physician, 11-20 minutes

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

This service was performed 58 times for 43 patients

Telephone medical discussion with physician, 5-10 minutes

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

This service was performed 20 times for 14 patients

Ultrasound scan of head and neck soft tissue

An ultrasound scan of the head and neck soft tissue is a non-invasive procedure that uses sound waves to create images of the soft tissues in these areas. It helps identify any abnormalities or issues, such as tumors, cysts, or infections. It's painless and doesn't involve radiation.

This service was performed 34 times for 31 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $35.59 for a new patient copayment and $27.49 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 90806 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $142.39
  • Minimum New Patient Price $62.96
  • Maximum New Patient Price $187.6
  • Average New Patient Copayment $35.59
  • Minimum New Patient Copayment $15.74
  • Maximum New Patient Copayment $46.9

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $109.96
  • Minimum Established Patient Price $20.84
  • Maximum Established Patient Price $153.61
  • Average Established Patient Copayment $27.49
  • Minimum Established Patient Copayment $5.21
  • Maximum Established Patient Copayment $38.4

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Peter Linfoot is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
GRANDE RONDE HOSPITAL900 SUNSET DRIVE
LA GRANDE, OR 97850
(541) 963-8421Critical Access Hospitals
PROVIDENCE ST MARY MEDICAL CENTER401 W POPLAR ST
WALLA WALLA, WA 99362
(509) 522-5900Acute Care Hospitals

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NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1396777264, we treat the final digit (4) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
3
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
6
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
7
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
2
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
4
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 9 → 18 → 9 7 → 14 → 5 7 → 14 → 5 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 3 + 1 + 8 + 6 + 1 + 4 + 7 + 1 + 4 + 2 + 1 + 2 + 24 = 66

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1396777264.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Critical Care Medicine)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Nephrology)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Pulmonary Disease)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Cardiovascular Disease)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Obstetrics & Gynecology
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Nurse Practitioner (Family)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Geriatric Medicine)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Pharmacist (Pharmacotherapy)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Non-Pharmacy Dispensing Site
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Pharmacist (Ambulatory Care)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Specialist
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Nurse Practitioner (Adult Health)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Rheumatology)
2699 ATLANTIC AVE
LONG BEACH, CA 90806
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2699 ATLANTIC AVE
LONG BEACH, CA 90806

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1396777264, enumerated as an "individual" on July 07, 2006.

The provider is located at 2699 ATLANTIC AVE LONG BEACH, CA 90806 and the phone number is (562) 426-3333.

Internal Medicine with taxonomy code 207RE0101X and a focus in Endocrinology, Diabetes & Metabolism.

Peter Linfoot is affiliated with: GRANDE RONDE HOSPITAL and PROVIDENCE ST MARY MEDICAL CENTER.